WELLS REAL ESTATE FUND XII LP
POS AM, EX-10.13, 2000-07-25
REAL ESTATE DEALERS (FOR THEIR OWN ACCOUNT)
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<PAGE>

                                 EXHIBIT 10.13

                                 OFFICE LEASE

                                    BETWEEN

                       WELLS FUND XII-REIT JOINT VENTURE

                                      AND

                        SIEMENS AUTOMOTIVE CORPORATION
<PAGE>

                                 OFFICE LEASE

                                    between

                           TROY DEVELOPMENT #1, LLC
                     a Colorado limited liability company
                                 (as Landlord)

                                      and

                        SIEMENS AUTOMOTIVE CORPORATION
                                  (as Tenant)
<PAGE>

                               TABLE OF CONTENTS

Section                                                             Page
-------                                                             ----
 1. PRINCIPAL TERMS................................................   1
 2. GENERAL COVENANTS..............................................   3
 3. TERM...........................................................   3
 4. RENT...........................................................   3
 5. COMPLETION OR REMODELING OF THE BUILDING COMPLEX...............   4
 6. OPERATING EXPENSES.............................................   8
 7. UTILITIES......................................................   9
 8. TAXES..........................................................   9
 9. QUIET ENJOYMENT................................................  10
10. USE AND CHARACTER OF OCCUPANCY.................................  10
11. HAZARDOUS MATERIALS............................................  11
12. MAINTENANCE AND REPAIR.........................................  13
13. TENANT'S ALTERATIONS...........................................  15
14. MECHANICS' LIENS...............................................  16
15. SUBLETTING AND ASSIGNMENT......................................  16
16. INDEMNIFICATION................................................  18
17. SURRENDER......................................................  19
18. CASUALTY AND RESTORATION OF BUILDING COMPLEX...................  19
19. CONDEMNATION...................................................  20
20. DEFAULT BY TENANT..............................................  20
21. DEFAULT BY LANDLORD............................................  24
22. SUBORDINATION AND ATTORNMENT...................................  25
23. HOLDING OVER...................................................  25
24. ESTOPPEL CERTIFICATE...........................................  25
25. RIGHT TO CANCEL................................................  26
26. RIGHT OF RENEWAL...............................................  26
27. RIGHT OF FIRST OFFER TO PURCHASE...............................  28
28. NOTICE.........................................................  28
29. BROKERAGE......................................................  28
30. MISCELLANEOUS..................................................  29
31. EXHIBITS.......................................................  32
32. WAIVER OF JURY TRIAL...........................................  32
<PAGE>

                                LEASE AGREEMENT

          LEASE, dated as of January ___, 2000, by and between TROY
DEVELOPMENT #1, LLC, a Colorado limited liability company ("Landlord") and
                                                            --------
SIEMENS AUTOMOTIVE CORPORATION ("Tenant").
                                 ------


                             W I T N E S S E T H:
                             -------------------


          1.  PRINCIPAL TERMS.  Capitalized terms appearing in quotations in
this Section, elsewhere in this Lease and in any of the Exhibits annexed hereto,
are definitions of such terms as used in this Lease and its Exhibits and shall
have the defined meaning whenever used.


1.1. "Base Rent":            Period               Monthly    Rent/sq. ft.
                             ------             -----------  ------------

                             Months    1- 6      $ 72,971.08     $17.00
                             Months    7-12      $109,159.83     $17.00
                             Months   13-24      $111,856.72     $17.42
                             Months   25-36      $114,553.61     $17.84
                             Months   37-48      $117,250.50     $18.26
                             Months   49-60      $119,947.39     $18.68
                             Months   61-72      $122,644.28     $19.10
                             Months   73-84      $125,341.17     $19.52
                             Months   85-96      $128,038.06     $19.94
                             Months   97-108     $130,734.95     $20.36
                             Months  109-126     $133,431.84     $20.78

1.2. "Brokers":              Signature Associates and
                             Cushman & Wakefield of Michigan, Inc.

1.3. "Building":             The building consisting of 77,054 rent-able (72,452
                             usable) square feet of space located at the
                             intersection of Investment Drive and Crooks Road,
                             Troy, Michigan and known as "4685 Investment
                             Drive".

1.4. "Initial Term":         "Commencement Date": the later to occur of (i)
                             January 1, 2000 or (ii) that date on which
                             Landlord's Work has been "substantively completed"
                             and the Building Complex has been delivered to
                             Tenant as herein provided.

                             "Expiration Date":   August 31, 2010
<PAGE>

1.5.  Landlord's
      Notice Address:        The Pauls Corporation
                             Attention:  Mr. Paul Powers
                             3950 Lewiston Street - Suite 100
                             Aurora, Colorado 80011

1.6.  Parking:               4.2 parking spaces per each 1,000 square feet of
                             rentable space in the Building Complex, consisting
                             of approximately 298 existing surface parking
                             spaces, together with such additional parking
                             spaces as may be made available for Tenant's use by
                             Tenant, at Tenant's expense, in accordance with
                             applicable zoning requirements.

1.7. "Phase I":              The first and second floors of the Building,
                             comprising 51,509 rentable sq. ft.

     "Phase II":             The third floor of the Building, comprising 25,545
                             rentable sq. ft.
1.8. "Phase I
      Rent Commencement
      Date":                 Notwithstanding the provisions of Section 1.1
                             hereof, the later to occur of (i) that date which
                             is two (2) months after the Commencement Date or
                             (ii) March 1, 2000.
     "Phase II
      Rent Commencement
      Date":                 Notwithstanding the provisions of Section 1.1
                             hereof, the earlier to occur of that date (i) which
                             is eight (8) months after the Commencement Date or
                             (ii) on which Tenant commences business operations
                             in Phase II of the Premises.

1.9. "Premises":             All of the Building.

1.10. Tenant's Notice
      Addresses:

      Pre- and Post-         Siemens Automotive Corporation
      Commencement           Attention:  Manager/Business Operations
      Date Address:          2400 Executive Hills Drive
                             Auburn Hills, Michigan  48326

                                      -2-
<PAGE>

      with copies to:        Siemens Real Estate, Inc.
                             Attention: Lease Administrator
                             186 Wood Avenue South
                             Iselin, New Jersey 08830

                             Siemens Corporation
                             Attention:  Real Estate Counsel
                             1301 Avenue of the Americas - 44th Floor
                             New York, New York  10019

1.11. Attachments:           Exhibit A  - The Building Complex
                             Exhibit B-1- Landlord's Work, including
                                          Base Building Construction
                                          Documents and
                                          Plans/Specifications
                             Exhibit B-2- Tenant's Work
                             Exhibit C  - Building Rules and
                                          Regulations
                             Exhibit D  - Commencement Certificate


          2.  GENERAL COVENANTS.

          2.1.  Lease of the Building Complex.  Tenant covenants to pay Rent and
                -----------------------------
to perform its obligations hereinafter set forth and, in consideration therefor,
Landlord shall lease to Tenant the Premises, together with the exclusive right
to use all plazas, parking areas, landscaped areas and other areas on the real
property described on Exhibit A annexed hereto (collectively, the "Building
                                                                   --------
Complex").
-------
          2.2.  Net Lease.  Landlord will not be obligated to pay any expenses
                ---------
or incur any liabilities of any kind relating to the Building Complex during the
Term, except as specifically assumed by Landlord pursuant to the terms hereof.

          3.  TERM.  The Initial Term shall commence at 12:01 a.m. on the
Commencement Date and shall terminate at 12:00 midnight on the Expiration Date
(the Initial Term, together with any extensions thereof, being referred to as
the "Term").
     ----

          4.  RENT.  Subject to the provisions below, commencing on the Phase I
Rent Commencement Date and the Phase II Rent Commencement Date, respectively,
and on the first day of each calendar month thereafter, Tenant shall pay Rent in
advance without notice. All amounts, including Base Rent, Operating Expenses,
utilities and

                                      -3-
<PAGE>

     Taxes, to be paid by Tenant pursuant to this Lease (collectively, "Rent")
                                                                        ----
     shall be paid without demand, set-off or abatement (except as otherwise
     expressly provided herein), at the office of Landlord set forth in Section
     1.5 hereof or at such other place as Landlord designates in writing to
     Tenant from time to time. Notwithstanding anything in this Section 4 to the
     contrary, Tenant's obligations with respect to Operating Expenses, Taxes,
     Utilities and all other non-Base Rent obligations hereunder shall commence
     on the Commencement Date.


          5.  COMPLETION OR REMODELING OF THE BUILDING COMPLEX.

          5.1.   Landlord's and Tenant's Work.  Landlord shall construct the
                 ----------------------------
     Building in accordance with the Base Building Construction Documents and
     Plans/Specifications referenced in Exhibit B-1 annexed hereto (the "Base
                                                                         ----
     Building"), which shall include all matters of construction set forth on
     --------
     Exhibit B-1 (collectively, "Landlord's Work"), and Tenant shall construct
                                 ---------------
     the finish work to the Base Building subsequent thereto ("Tenant's Work")
                                                               -------------
     which shall include all matters of construction set forth on Exhibit B-2
     annexed hereto.  Except for the completion of Landlord's Work in a good and
     workmanlike manner, in accordance with all approved plans and
     specifications therefor and in accordance with all applicable legal
     requirements, Landlord shall have no other obligation for the construction
     of the Building Complex (subject to Landlord's correction and completion of
     all "Latent Defects" and "Punch List" items relating thereto).  If Landlord
     is delayed in completing Landlord's Work (for reasons other than resulting
     from Tenant-caused delays), then each of the Phase I Rent Commencement Date
     and the Phase II Rent Commencement Date, as applicable, shall be postponed
     one day for each day (or portion thereof), commencing on February 1, 2000,
     that Landlord is delayed in delivering the Phase I and/or Phase II portion
     of the Base Building, as the case may be, to Tenant.  If Landlord's Work
     shall be completed on or after April 1, 2000, then each of the Phase I Rent
     Commencement Date and the Phase II Rent Commencement Date, as applicable,
     shall be postponed two (2) days for each day (or portion thereof) after
     April 1, 2000 that Landlord is delayed (subject to force majeure) in
     delivering the Phase I and/or Phase II portion of the Base Building, as the
     case may be, to Tenant.  For purposes of this Section 5.1, "force majeure"
     shall mean delays due to acts of God, inability to obtain materials or
     labor because of governmental restrictions or similar causes beyond
     Landlord's control (excluding work slowdowns and stoppages, but including
     strikes not caused by Landlord).

                                      -4-
<PAGE>

     The term "Latent Defects" as used herein shall mean only hidden or
               --------------
     concealed defects in the structure of the Building resulting from poor
     quality workmanship or materials which Tenant could not have discovered by
     reasonable observation or inspection (without imposing any obligation on
     Tenant to make such observation or inspection and without uncovering
     completed work), and shall exclude defects resulting from Tenant's
     negligence or intentional acts or from normal wear and tear or casualty.

     Immediately following substantial completion of Landlord's Work, Landlord
     shall cause its Base Building Contractor to inspect the Premises with
     representatives of Landlord and Tenant in order to prepare a written punch
     list (the "Punch List") of unfinished items of Landlord's Work prior to
                ----------
     Tenant's move into the Premises.  Tenant shall execute the Punch List to
     indicate approval thereof, and Landlord shall cause its General Contractor
     to correct all such Punch List items with reasonable diligence (but not
     later than thirty (30) days after the Commencement Date).

          5.2.  Construction of Leasehold Improvements.  Tenant shall perform
                --------------------------------------
     Tenant's Work with general contractor(s), construction manager(s),
     subcontractors and engineers of its choice, subject to Landlord's approval,
     not to be unreasonably withheld, delayed or conditioned.  Tenant's Work
     shall include the installation of special Building systems including,
     without limitation, kitchens, supplemental HVAC systems and computer
     facilities.  Landlord shall not charge any supervisory fees with respect to
     Tenant's Work.  Landlord's and Tenant's contractors, employees and all
     other designated personnel shall have unimpeded access to the Building
     Complex necessary for the construction thereof in accordance with the
     Building's Rules and Regulations, a copy of which being annexed hereto as
     Exhibit C.

     Tenant shall cause its architect to furnish to Landlord, for Landlord's
     approval (not to be unreasonably withheld or delayed), complete
     architectural plans, drawings and specifications and complete cross-
     coordinated mechanical, electrical and structural working drawings for (i)
     all of the Premises, showing the location of doors, partitions, electrical
     and telephone outlets, plumbing fixtures, heavy floor loads and other
     special requirements and reflective ceiling plans desired by Tenant
     therefor, and (ii) any internal or external communications or special
     utility facilities which will require conduiting or other improvements
     within common areas, all in such form and in such detail as may be
     reasonably required by Landlord.  Such complete plans, drawings and
     specifications are referred to herein as the "Final Plans".  If Landlord
                                                   -----------
     shall disapprove of any portion of the Final Plans, Landlord shall advise
     Tenant of its comments and proposed

                                      -5-
<PAGE>

     revisions, and its reasons therefor, as are reasonably required by
     Landlord. Tenant shall then submit to Landlord, for Landlord's approval, a
     modification or redesign of the Final Plans, incorporating the reasonable
     revisions or modifications required by Landlord (and such other changes as
     are suggested by Tenant). Tenant shall not make any changes to the Final
     Plans without the prior written consent of Landlord, which consent shall
     not be unreasonably withheld or delayed. In the event Landlord fails to
     respond to any proposed Final Plans or revisions/modifications within ten
     (10) business days after Landlord's receipt thereof, Landlord shall be
     deemed to have given its consent thereto. Tenant shall cause the Final
     Plans to comply with all Applicable Laws (hereinafter defined).
     Notwithstanding the fact that Landlord's architects and engineers shall
     have the right to review the Final Plans, Tenant shall be solely
     responsible for the design and function of such Final Plans and Tenant
     shall construct Tenant's Work in substantial compliance with the approved
     Final Plans and shall endeavor to cause its contractors to complete all
     such work with good quality workmanship using only new materials and
     equipment.

     Prior to the Expiration Date, Tenant, at its expense, shall cause the
     following work to be performed in and to the Premises (unless Landlord, at
     any time during the Term, elects to have Tenant surrender the following
     described improvements to Landlord in their then-current condition):  (i)
     restore the mechanical and ceiling systems in the shipping and receiving
     area shown on Tenant's plans included as part of Tenant's Work (referenced
     in Exhibit B-2) to the condition shown on such plans; (ii) restore any
     modifications to the Building's exterior wall structure and landscaping
     resulting from the installation of Tenant's drive-in door as part of the
     shipping and receiving area to the condition shown on the Base Building
     Construction Documents; and (iii) replace any finish materials installed by
     Tenant in and to the Building's ground floor lobby with such finish
     materials (or their reasonable equivalent) as would have been installed in
     such space by Landlord as part of its originally contemplated design
     therefor (as reflected on certain plans and specifications identified on
     Exhibit B-1 hereto), Landlord hereby acknowledging that Tenant shall have
     no responsibility to make any design, structural or system changes to any
     portion of such lobby after completion thereof as part of Landlord's Work
     and Tenant's Work.

     Tenant shall cause its architect to provide documentation for all changes
     to the Final Plans at the time each change is authorized for construction.
     Within sixty (60) days after the date of substantial completion of Tenant's
     Work, Tenant shall submit to

                                      -6-
<PAGE>

     Landlord a set of conformed plans incorporating all changes and/or
     revisions that have been made subsequent to Landlord's approval of the
     Final Plans.

     Tenant acknowledges that Landlord has "pre-stocked" certain Building
     Standard doors, including two (2) pairs of glass doors, for use in the
     Building, which doors shall be used by Tenant as part of Tenant's Work.

     If the Final Plans or any amendment thereof or supplement thereto shall
     require changes in Landlord's Work, the increased cost of the Base Building
     improvements caused by such changes shall be borne by Tenant.  Tenant shall
     be solely responsible for all costs of Tenant Work in excess of Landlord's
     Contribution.

     Landlord, at its expense, shall obtain the "Certificate of Occupancy on the
     Building Shell (Less Tenant Improvements)" from the City of Troy upon its
     completion of Landlord's Work.  Tenant, at its expense, shall obtain the
     final "Certificate of Occupancy" with respect to the Building from the City
     of Troy upon its completion of Tenant's Work.

          5.3.   Commencement Date Determination.  Except as provided in the
                 -------------------------------
     Work Letter, the commencement of Tenant's Work shall be deemed an
     acknowledgment by Tenant of the satisfactory completion of Landlord's Work,
     subject, however, to the correction and completion by Landlord of all
     Latent Defects and Punch List items.  Upon the commencement of the Term,
     Landlord and Tenant agree to execute a Commencement Certificate in the form
     annexed hereto as Exhibit D, setting forth the Commencement Date and the
     Expiration Date.  Landlord's Work shall be deemed "substantially completed"
     at such time as Landlord delivers to Tenant the "Certificate of Occupancy
     on the Building Shell (Less Tenant Improvements)".

          5.4.   Compliance with Laws.  Landlord shall cause Landlord's Work and
                 --------------------
     the Base Building to fully comply with Americans with Disabilities Act
     ("ADA") requirements within the local jurisdiction guidelines, as such
       ---
     guidelines are enforced at the time of the issuance of the Building Permit
     for the construction of the Base Building including, without limitation,
     access from parking lots, location of parking spaces, restroom facilities
     and emergency lighting.  In addition, Landlord shall cause the Base
     Building to be completed pursuant to Exhibit B-1 annexed hereto and in
     accordance with all other applicable building codes, ordinances and legal
     requirements in existence as of the date of approval and issuance of such
     Building Permit ("Applicable Laws").
                       ---------------

                                      -7-
<PAGE>

          5.5.  Tenant Improvement Allowance.  Subject to the terms and
                ----------------------------
     conditions set forth below, Landlord shall reimburse Tenant for Tenant's
     costs incurred to complete Tenant's Work (specifically excluding the cost
     of any generator and any of Tenant's trade fixtures) in the amount of
     $2,173,590, less (i) the pre-approved costs for Landlord's "pre-stock"
     doors; i.e., 50 wood doors/$13,000 total and two (2) pairs of glass
     doors/$11,904 total) and (ii) Landlord's reasonable out-of-pocket costs for
     its review of Tenant's preliminary plans, construction documents and final
     as-built Tenant's Work towards the cost of Tenant's Work ("Landlord's
                                                                ----------
     Contribution"), such costs to include architectural, engineering,
     ------------
     expediting and other consulting fees, all building department permits and
     all costs of construction (including labor and materials).  On a monthly
     basis, Landlord shall disburse to Tenant that portion of Landlord's
     Contribution equal to the amount set forth in Tenant's requisition.  Each
     such disbursement shall be made by Landlord prior to the end of the
     calendar month in which a requisition has been submitted by Tenant,
     provided that Tenant has submitted such requisition on or before the 8th
     day of such calendar month.  If Tenant's requisition shall be submitted to
     Landlord after the 8th day of a calendar month, the disbursement with
     respect thereto shall be made by Landlord within five (5) business days
     after its receipt of such funds from its construction lender (but in no
     event later than the last day of the next succeeding calendar month).  No
     advance shall be made by Landlord until its receipt of a request therefor
     from Tenant and the submission by Tenant of (i) a certificate signed by
     Tenant dated not more than ten (10) days prior to such request setting
     forth the sum then justly due to contractors, subcontractors, materialmen,
     engineers, architects and other persons who have rendered services or
     furnished materials in connection with Tenant's Work and (ii) lien waivers
     executed by such contractors having performed and received payment for
     their services to the date of such requisition.  In the event any portion
     of Landlord's Contribution remains unused following the completion of
     Tenant's Work, such balance shall be applied by Tenant to its next
     installment(s) of Rent payable hereunder.


          6.   OPERATING EXPENSES.  During the Term (commencing on the
     respective Phase I and Phase II Rent Commencement Dates as applicable to
     each of Phase I and Phase II, respectively) and as applicable only to any
     period during the Term, Tenant shall pay all Operating Expenses payable
     with respect to the Building Complex.  Payments thereof for any fractional
     calendar month shall be prorated.  The term "Operating Expenses" means all
     costs and expenses incurred by Tenant with respect to the management,
     maintenance and operation of the Building Complex; however,

                                      -8-
<PAGE>

     Operating Expenses to be borne by Tenant do not include: Structural Repairs
     (as hereinafter defined) required to be made by Landlord under Section 12.2
     hereof; debt service under mortgages or ground rent under ground leases;
     costs of restoration to the extent of net insurance proceeds received by
     either Landlord or Tenant with respect thereto; and leasing commissions or
     the costs of renovating space for other tenants (if applicable). Landlord
     will not be obligated to pay any Operating Expenses relating to the
     Building Complex during the Term, except as specifically assumed by
     Landlord pursuant to the provisions of Section 12.2 hereof.


          7.  UTILITIES. Tenant, as and when billed therefor by a utility
     provider, shall pay for all water, gas, electricity, heat, light, power,
     telephone, sewer, sprinkler service, trash collection and other utilities
     and services used by Tenant (or at the instruction or request of Tenant) in
     the Building Complex, all maintenance or similar charges for utilities
     imposed by any governmental entity or utility provider, together with any
     taxes, penalties, surcharges or the like pertaining to Tenant's use
     thereof.  Landlord shall not be liable for any interruption or failure of
     utilities or any other service to the Building Complex (unless due to the
     sole negligence of Landlord) and no such interruption or failure (unless
     due to the sole negligence of Landlord) shall result in the abatement of
     Rent hereunder.  Tenant, at Tenant's election and cost, at any time may
     make arrangements to obtain electricity directly from the utility provider.


          8.  TAXES.

          8.1 Taxes Defined.  Within fifteen (15) days after receipt of
              -------------
     Landlord's invoice therefor (together with a copy of the relevant bill(s)
     from the municipality), Tenant shall pay to Landlord the amount payable for
     Taxes.  The term "Taxes" shall mean all real property taxes and assessments
     levied against the Building Complex by any governmental or quasi-
     governmental authority, including taxes, assessments, surcharges or service
     or other fees of a nature not presently in effect which are hereafter
     levied on the Building Complex, whether in lieu of or in addition to, any
     current real estate taxes and assessments.  In no event shall Taxes and
     assessments include any federal or state income, inheritance or other
     personal taxes levied or assessed on Landlord, or penalties or interest in
     connection therewith, unless Tenant's payment therefor is delinquent and
     Landlord actually incurs such penalty.  If, at any time during the Term,
     the methods

                                      -9-
<PAGE>

     of taxation prevailing on the date hereof shall be altered so that in lieu
     of or as a substitute for the whole or any part of the Taxes now levied,
     assessed or imposed on real estate as such, there shall be levied, assessed
     or imposed a tax ("Alternative Tax") on the rents received from such real
                        ---------------
     estate, or a license fee measured by rents, a so-called "value-added tax"
     or other tax in lieu or fee resulting from revision of the present real
     estate tax structure, then the Alternative Tax shall thereafter be included
     within the definition of Taxes. Landlord shall pay all Taxes when due and
     in any manner permitted by law. Tenant, at its expense, shall have the
     right to contest, with any appropriate taxing authority, the amount of any
     Taxes payable by it hereunder, provided that Landlord's interest in the
     Building Complex is not subject to risk of lien or foreclosure (in which
     event Tenant shall provide reasonable security to Landlord in order that
     Landlord's interest shall not be jeopardized).

          8.2.   Personal Property Taxes.  Tenant shall pay, before delinquency,
                 -----------------------
     all taxes and assessments levied against, or on account of, all of its
     fixtures, equipment and personal property located in or upon the Building
     Complex.  Tenant, at Tenant's election and cost (and with Landlord's prior
     consent, such consent not to be unreasonably withheld or delayed), may seek
     to modify or seek exemption from, any Applicable Law (including zoning)
     which affects any use or contemplated use of the Building Complex by
     Tenant.


          9.  QUIET ENJOYMENT.  So long as an Event of Default has not occurred
     and be continuing hereunder, Tenant shall be entitled to the quiet
     enjoyment and peaceful possession of the Building Complex subject to the
     provisions of this Lease.


          10.  USE AND CHARACTER OF OCCUPANCY.

          10.1.  Compliance with Applicable Laws.  Tenant, at Tenant's expense,
                 -------------------------------
     shall comply with all Applicable Laws which impose any duty upon Landlord
     or Tenant with respect to Tenant's manner of use of the Building Complex.
     Tenant, at Tenant's election and cost (and with Landlord's prior consent,
     such consent not to be unreasonably withheld or delayed), may seek to
     modify or seek exemption from any Applicable Law (including zoning) which
     affects any use or contemplated use of the Building Complex by Tenant.
     Tenant shall not commit or permit waste or any nuisance on or in the
     Building Complex.

                                     -10-
<PAGE>

     Except as set forth in Section 5.4 hereof, Tenant, at its expense, shall be
     responsible for any alterations, modifications or improvements to the
     Building Complex, and the acquisition of any auxiliary aids, required under
     the ADA: (i) as a result of Tenant (or any subtenant, assignee or
     concessionaire) being a Public Accommodation (as defined in the ADA); (ii)
     as a result of the Premises being a Commercial Facility (as defined in the
     ADA); or (iii) as a result of any special accommodation that Tenant, as an
     employer, is required to make for the benefit of any employee of Tenant (or
     any employee of any subtenant, assignee or concessionaire); or (iv)
     relating solely to Tenant's Work and subsequent improvements made by Tenant
     or by any subtenant, assignee or concessionaire, whether or not Landlord's
     consent to such leasehold improvements was obtained.

          10.2.  Permitted Use.  Tenant shall not use or occupy, or permit or
                 -------------
     suffer to be used or occupied, the Building Complex (or any part thereof)
     other than for general offices, automotive diagnostic testing/workshop(s)
     (if, and to the extent, legally permissible) and all other legally
     permitted uses (collectively, the "Permitted Use") and for all activities
                                        -------------
     ancillary thereto, such as (i) kitchens, pantries and dining rooms for the
     feeding of Tenant's employees and guests, (ii) vending machines and snack
     bars for the sale of food, including food service and sundry shop
     operations, (iii) business machines and equipment used in connection with
     the conduct of Tenant's business, (iv) libraries for Tenant's employees,
     (v) computer and other electronic data processing equipment and (vi) board,
     conference and training rooms for Tenant's employees and customers.


          11.  HAZARDOUS MATERIALS.

          11.1.  For purposes of this Lease, "Hazardous Materials" means any
     explosives, radioactive materials, hazardous wastes or hazardous substances
     including, without limitation, substances defined as "hazardous substances"
     in the Comprehensive Environmental Response, Compensation and Liability Act
     of 1980, as amended, 42 U.S.C. (S)(S)9601-9657; the Hazardous Materials
     Transportation Act of 1975, 49 U.S.C. (S)(S)1801-1812; the Resource
     Conservation and Recovery Act of 1976, 42 U.S.C. (S)(S)6901-6987; or any
     other federal, state or local statute, law, ordinance, code, rule,
     regulation, order or decree regulating, relating to or imposing liability
     or standards of conduct concerning hazardous materials, waste or substances
     now or at any time hereafter in effect (collectively, "Hazardous Materials
                                                            -------------------
     Laws").
     ----

                                     -11-
<PAGE>

          11.2.  Tenant will not cause or permit the storage, use, generation or
     disposition of any Hazardous Materials in, on or about the Building Complex
     by Tenant, its agents, employees or contractors; provided, however, that
     the consent of Landlord shall not be required for Tenant's use of standard
     cleaning supplies, toner for photocopying machines and other similar
     materials, in containers and quantities reasonably necessary for and
     consistent with Tenant's normal and ordinary use in the routine operation
     or maintenance of Tenant's office equipment or in the routine janitorial
     service, cleaning and maintenance of the Building Complex.  Tenant will not
     permit the Building Complex to be used or operated in a manner that may
     cause it to be contaminated by any Hazardous Materials in violation of any
     Hazardous Materials Laws.  Tenant will immediately advise Landlord in
     writing of (1) any and all enforcement, cleanup, remedial, removal or other
     governmental or regulatory actions instituted, completed or threatened
     pursuant to any Hazardous Materials Laws relating to any Hazardous
     Materials affecting the Building Complex and (2) all claims made or
     threatened by any third party against Tenant, Landlord or the Building
     Complex relating to damage, contribution, cost recovery, compensation, loss
     or injury resulting from any Hazardous Materials on or about the Building
     Complex.  Without Landlord's prior written consent (not to be unreasonably
     withheld, delayed or conditioned), Tenant will not take any remedial action
     or enter into any agreements or settlements in response to the presence of
     any Hazardous Materials in, on or about the Building Complex.

          11.3.  Tenant will be responsible for and will defend, indemnify and
     hold Landlord harmless from and against all claims, costs and liabilities,
     including reasonable attorney fees and costs, arising out of or in
     connection with Tenant's breach of its obligations in this Section 11.
     Tenant will be responsible for and will defend, indemnify and hold Landlord
     harmless from and against any and all claims, costs and liabilities,
     including reasonable attorneys' fees and costs, arising out of or in
     connection with the removal, cleanup and restoration work and materials
     necessary to return the Building Complex and any other property located in,
     on or about the Building Complex to their condition existing prior to the
     introduction of Hazardous Materials by Tenant, its agents, employees or
     contractors.  Tenant's obligations under this Section 11 will survive the
     expiration or other termination of this Lease.

          11.4.  Landlord represents and warrants to Tenant that Landlord has
     not used or disposed of any Hazardous Materials in the Building Complex,
     and that the Building Complex was constructed without exceeding federal
     maximum allowable amounts of

                                     -12-
<PAGE>

     asbestos-containing products or other Hazardous Materials. Further,
     Landlord has received no notice from any governmental authority having
     jurisdiction over the Building Complex that the Building Complex is in
     violation of any Hazardous Materials Laws or any of the regulations adopted
     or publications promulgated pursuant thereto, or any Applicable Laws in
     effect on the date hereof relating to protection of public health, safety
     or the environment. Landlord shall be responsible for and will defend,
     indemnify and hold Tenant harmless from and against any and all claims,
     costs and liabilities, including reasonable attorneys' fees and costs,
     arising out of or in connection with Landlord's introduction of any
     Hazardous Materials in, on or about the Building Complex and the removal,
     cleanup and restoration work and materials necessary to return the Building
     Complex to its condition existing prior to the introduction of such
     Hazardous Materials by Landlord, its agents, employees or contractors.
     Landlord's obligations under this Section 11 will survive the expiration or
     other termination of this Lease.


          12.  MAINTENANCE AND REPAIR.

          12.1.  Tenant's Obligations.  Tenant, at its expense and subject to
                 --------------------
     the provisions of Section 12.2 hereof, shall make, or cause to be made
     through maintenance contracts or otherwise, all repairs and replacements to
     the Building Complex necessary to maintain it in good order, condition and
     repair consistent with the operation of a first-class suburban general
     purpose office building (casualty and reasonable wear and tear excepted)
     and to maintain the Building Complex in a clean and sanitary condition
     (including, but not limited to, trash and snow removal, repainting, parking
     lot restriping,  maintenance and repairs (excluding resurfacing, to the
     extent the same is an obligation of Landlord pursuant to Section 12.2
     hereof), sidewalk maintenance and repair (excluding replacement, to the
     extent the same is an obligation of Landlord pursuant to Section 12.2
     hereof), landscape maintenance, janitorial services, window cleaning,
     elevator repair and maintenance, Building security, if any, and HVAC repair
     and maintenance (including replacement, if Tenant determines, in its sole
     discretion, that the HVAC system is incapable of providing desired levels
     of output for Tenant's purposes); except that, Tenant shall not be
     obligated to make any Structural Repairs, as defined in Section 12.2
     hereof, or make any repairs resulting from defective or malfunctioning
     Landlord's Work or Base Building improvements for a period of one (1) year
     after completion thereof or for such longer period as provided in any
     contractor's warranty, unless the need therefor results from the misuse
     thereof by or negligence of Tenant, its agents or employees.  Landlord

                                     -13-
<PAGE>

     shall assign to Tenant all assignable warranties with respect to the Base
     Building improvements, including warranties with respect to the Building
     fixtures and equipment and, to the extent not assignable, Landlord shall
     cooperate with Tenant in enforcing the terms and provisions of applicable
     warranties upon request of Tenant.

     Tenant, at its expense, shall enter into and deliver to Landlord one or
     more maintenance service contracts reasonably acceptable to Landlord, with
     a contractor(s) approved by Landlord (such approvals not to be unreasonably
     withheld or delayed) for hot water, heating and air conditioning and other
     mechanical systems and equipment within or serving the Premises.  The
     service and maintenance contract(s) shall include all services required by
     Landlord based upon the operation hours of each applicable service.

          12.2. Landlord's Obligations.  Landlord, at its expense, shall make
                ----------------------
     all repairs and replacements which may be necessary to Landlord's Work and
     the Base Building improvements for a period of one (1) year after
     completion thereof or for such longer period as provided by any
     contractor's warranty.  Further, Landlord, at its expense, shall make all
     repairs and replacements which may be necessary to the structural support
     system of the Building's roof, foundation piers and stem walls, and
     structural elements of exterior walls (including structural elements of
     curtain walls) (collectively such elements are referred to as the
     "Structure" and such repairs or replacements are "Structural Repairs"),
      ---------                                        ------------------
     unless the need therefor results from the negligence of Tenant, its agents
     or employees.  To the extent any repairs, replacements, renewals and
     alterations arise out of, or are in any way caused by fire or other
     casualty, responsibility therefor is governed by Section 18 hereof.  Tenant
     shall notify Landlord as soon as reasonably practicable following discovery
     by Tenant or its maintenance contractor (if applicable) of the existence of
     any condition which is believed to require Structural Repairs.  Landlord,
     at its expense, shall cause all necessary replacements of the sidewalks,
     and cause the repaving of the parking area, unless the need therefor
     results from the failure of Tenant to properly maintain, or from the misuse
     thereof by or negligence of Tenant, its agents or employees.  Landlord may
     use all portions of the Building Complex (provided Landlord uses reasonable
     efforts to limit its interference with Tenant's use thereof) as may be
     necessary to complete any of Landlord's obligations hereunder in an
     expeditious and workmanlike manner.

                                     -14-
<PAGE>

          13. TENANT'S ALTERATIONS.

          13.1.  Alterations.  Tenant shall not make any alterations to the
                 -----------
     Premises which exceeds $100,000 in the aggregate during any twelve (12)
     month period during the Term or which affects the structure or mechanical
     systems of the Building (regardless of cost), including installation of
     equipment or machinery which requires modifications to existing structural,
     mechanical or electrical systems (collectively, "Alterations") without in
                                                      -----------
     each instance first obtaining the written consent of Landlord (such consent
     not to be unreasonably withheld or delayed).  Landlord's consent shall not
     be required with respect to Alterations other than as described above
     (e.g., Alterations costing less than $100,000, and any decorative items,
     floor or wall coverings and furnishings) and the $100,000 amount shall not
     include any "soft costs" such as filing fees and architects'/engineers'
     fees.  Landlord's consent or approval of the plans, specifications and
     working drawings for any Alterations shall not constitute any warranty or
     representation by Landlord (and shall not impose any liability on Landlord)
     as to their completeness, design, sufficiency or compliance with Applicable
     Laws.  Tenant, at its expense, shall (i) pay all reasonable out-of-pocket
     costs incurred by Landlord relating to the review and approval of Tenant's
     plans and specifications for all Alterations (excluding Tenant's Work) and
     the reasonable time-to-time monitoring of the performance of such work by
     Landlord's local representative (the amounts of such costs to be pre-
     approved by Tenant), (ii) obtain all governmental permits and approvals
     required and (iii) cause all Alterations to be completed in compliance with
     Applicable Laws.  All such work relating to Alterations shall be performed
     in a good and workmanlike manner, using new materials and equipment at
     least equal in quality to Tenant's Work and by Tenant's contractors,
     subject to Landlord's prior consent (not to be unreasonably withheld or
     delayed). Prior to the commencement of any Alterations by Tenant, Tenant
     shall deliver certificates issued by Tenant's insurance companies qualified
     to do business in the State of Michigan evidencing that worker's
     compensation, public liability insurance and property damage insurance (in
     amounts and on forms reasonably satisfactory to Landlord) are in force and
     maintained by all contractors and subcontractors engaged to perform such
     work.  All liability policies shall name Landlord as an additional insured.
     Each certificate shall provide that the insurance may not be cancelled or
     modified without ten (10) days' prior written notice to Landlord and
     Mortgagee.  Landlord has the right to post notices in the Premises (in
     reasonable locations designated by Landlord) stating that Landlord is not
     responsible for payment for such work and containing such other reasonable
     and related information as Landlord deems necessary.  All such work shall
     be

                                     -15-
<PAGE>

     performed in a manner which does not unreasonably interfere with Landlord
     or other tenants of the Building, or impose additional expenses upon
     Landlord in the operation of the Building Complex.

          13.2.  Surrender of Improvements.  Alterations shall remain upon and
                 -------------------------
     be surrendered with the Building Complex at the end of the Term unless, as
     part of Landlord's approval pursuant to Section 13.1 hereof, Landlord
     requests removal of the same, in which event such Alterations (other than
     Tenant's Work) shall be removed therefrom by Tenant at Tenant's expense
     (and Tenant shall repair any damage caused to the Building Complex
     resulting from such removal).  Tenant's movable office furniture and
     personal property shall be removed from the Building Complex at the end of
     the Term by Tenant.

          14.  MECHANICS' LIENS.  Tenant shall pay for all Alterations installed
     in or to the Building Complex by Tenant or at its request (other than
     Landlord's Work) including Tenant's Work (subject to Tenant's receipt of
     Landlord's Contribution) of a character which may result in liens on
     Landlord's interest in the Building Complex, and Tenant will keep the
     Building Complex free of all mechanics' and other liens on account of such
     work.  Tenant shall indemnify, defend and hold Landlord harmless from all
     liability, loss, damage or expenses, including reasonable attorneys' fees,
     on account of any claims of laborers, materialmen or others for work
     performed or for materials or supplies furnished to Tenant or persons
     claiming under Tenant.  If any lien is recorded against the Building
     Complex or any suit affecting title thereto is commenced as a result of
     such work, Tenant shall bond or otherwise cause such lien to be removed of
     record within thirty (30) days after written notice from Landlord.  Tenant
     may contest any such claim and, if a final judgment establishing the
     validity of any lien is entered, Tenant shall pay and satisfy the same
     promptly.


          15. SUBLETTING AND ASSIGNMENT.

          15.1.  Restrictions; Permitted Transfers.  Tenant shall not sublet any
                 ---------------------------------
     part of the Building Complex nor assign or otherwise transfer this Lease or
     any interest herein (referred to as "Transfer," and the subtenant or
                                          --------
     assignee being referred to as the "Transferee") without the prior consent
                                        ----------
     of Landlord, which consent will not be unreasonably withheld, delayed or
     conditioned provided that: (1) the Transferee is engaged in a business and
     the portion of the Building Complex will be used for the Permitted Use in a
     manner which is in keeping with the then standards of the Building Complex;
     (2) the Transferee has reasonable financial worth in

                                     -16-
<PAGE>

     light of the responsibilities involved; (3) Tenant is not in default under
     this Lease at the time it makes its request; and (4) the Transferee is not
     a governmental or quasi-governmental agency. Transfer includes the transfer
     of 50% or more of the stock in a corporate tenant whose stock is not
     publicly traded or the transfer of 50% or more of the beneficial ownership
     interests in a partnership or limited liability company tenant.
     Notwithstanding anything in this Lease to the contrary, Tenant shall have
     the right, without Landlord's prior consent, to merge with or sell all or
     substantially all of its assets to another entity, become a publicly traded
     company, assign its interest in this Lease or sublet all or a part of the
     Building Complex to a Permitted Transferee (as hereinafter defined) or
     transfer any of its stock to a Permitted Transferee, provided (1) the
     subject portion of the Building Complex will be used for the Permitted Use
     and (2) Tenant is not in default under this Lease at the time it makes any
     such assignment or sublease. In the event of an assignment, sublet or stock
     transfer to a Permitted Transferee, Tenant shall remain liable for all of
     its obligations hereunder. For purposes of this Lease, a "Permitted
     Transferee" means any person or entity which directly or indirectly
     controls, is controlled by or is under common control with Tenant, or to
     any entity resulting from a merger or consolidation with Tenant, or to any
     person or entity which acquires all or substantially all of the assets of
     Tenant.

          15.2.  Transferee's Payment of Rent.  Following any Transfer in
                 ----------------------------
     accordance with this Section 15, Landlord may, after any Event of Default
     hereunder, collect rent from the Transferee or occupant and apply the net
     amount collected to Rent.  Consent to a Transfer shall not relieve Tenant
     from obtaining Landlord's consent to any other Transfer.  Notwithstanding
     Landlord's consent to a Transfer, Tenant shall continue to be primarily
     liable for the obligations of Tenant hereunder.  If Tenant collects any
     rent or other amounts from a Transferee (excluding a Permitted Transferee)
     in excess of Rent for any monthly period (after deducting all incurred
     expenses in connection with such Transfer, including Alterations to the
     Building Complex), Tenant shall pay 50% of such net collected funds to
     Landlord and shall be entitled to keep and retain the balance thereof for
     its own account.

          15.3.  Transfer Documents.  All documents utilized by Tenant to
                 ------------------
     evidence a Transfer (other than to a Permitted Transferee) are subject to
     all reasonable prior approval by Landlord.  Tenant shall provide Landlord
     with such information as Landlord reasonably requests regarding a proposed
     subtenant, including financial information.

                                     -17-
<PAGE>

          15.4.  Recapture.  If Tenant requests Landlord's consent to sublet
                 ---------
     twenty-five (25%) percent or more of the Premises to a thirty party (i.e.,
     not a Permitted Transferee) for a term equal to the then current balance of
     the Term, Landlord may refuse to grant such consent and may terminate this
     Lease as to the portion of the Premises with respect to which such consent
     was requested; provided, however, if Landlord does not consent and elects
     to terminate the Lease as to such portion, Tenant may within fifteen (15)
     days after notice from Landlord to this effect, withdraw Tenant's request
     for consent.  If such termination occurs, it shall be effective on the date
     designated in a notice from Landlord and shall not be more than thirty (30)
     days following such notice.

          16. INDEMNIFICATION.

          16.1.  Damage to Property.  Tenant agrees that Landlord shall not be
                 ------------------
     liable for any injury or damage occurring through or caused by fire, water,
     steam or any repairs, alterations, injury, accident or any other cause to
     the Building Complex, to any furniture, fixtures, improvements or other
     personal property of Tenant kept or stored in the Building Complex, unless
     due to the negligence, willful acts or default of Landlord hereunder.

          16.2.  Indemnification.  Each party hereto agrees to indemnify, defend
                 ---------------
     and hold the other harmless from all liability, costs or expenses,
     including reasonable attorneys' fees, on account of damage to the person or
     property of any third party to the extent caused by the negligence or
     breach of this Lease by such party.

          16.3.  Insurance.  Throughout the Term, Tenant each shall maintain a
                 ---------
     commercial general liability policy, including protection against death,
     personal injury and property damage, issued by an insurance company
     qualified to do business in the State of Michigan, with a single limit of
     not less than $3,000,000.00.  All policies of insurance required under this
     Lease shall: (i) name Landlord as an additional insured; (ii) be primary to
     any other similar insurance of such additional insureds; (iii) provide that
     it may not be cancelled or modified without at least ten (10) days' prior
     notice to Landlord; and (iv) shall be provided by Tenant's insurer then
     providing insurance coverage to Tenant (and to other affiliated companies
     of Siemens Corporation) in the State of Michigan having a Best Insurance
     Guide policy holder's rating of A+ or better.  Prior to occupancy of the
     Building Complex, and prior to expiration of the then-current policy,
     Tenant shall deliver certificate(s)

                                     -18-
<PAGE>

     evidencing that all insurance required under this Lease is in effect.


          17. SURRENDER.  Subject to Section 13.2 hereof, upon the expiration or
     other termination of this Lease, Tenant shall quit and surrender to
     Landlord the Building Complex broom clean, in good order and condition,
     ordinary wear and tear and loss by fire or other casualty excepted, and
     Tenant shall remove all of its movable furniture and other personal
     property therefrom.  All movable personal property of Tenant not removed
     from the Building Complex upon the expiration or termination of this Lease
     shall be deemed abandoned and may be sold or otherwise disposed of by
     Landlord without notice to Tenant and without obligation to account; Tenant
     shall pay Landlord's expenses in connection with such disposition.


          18. CASUALTY AND RESTORATION OF THE BUILDING COMPLEX.

          18.1.  Tenant's Insurance.  Throughout the Term, Tenant shall maintain
                 ------------------
     "all risk" insurance coverage against risks of direct physical loss or
     damage for the full replacement cost of the Building Complex (as determined
     by the insurer) and Tenant's property and betterments therein.

          18.2.  Damage.  If the Building is damaged by fire or other casualty
                 ------
     which renders the Premises wholly untenantable or the damage is so
     extensive that Landlord's and Tenant's architects certify (or if such
     architects cannot agree as to such certification, then by a third architect
     selected by such two architects) in writing to Landlord and Tenant within
     sixty (60) days of said casualty that the Premises cannot, with the
     exercise of reasonable diligence, be made fit for occupancy with 120 days
     from the date of such certification, then, at the option of Landlord or
     Tenant exercised in writing to the other within thirty (30) days of such
     determination, this Lease shall terminate as of the date of occurrence of
     such damage.  In the event of termination, Tenant shall pay Rent duly
     apportioned up to the time of such casualty and forthwith surrender the
     Premises to Landlord.  If, however, the damage is such that such architects
     certify (or if such architects cannot agree as to such certification, then
     by a third architect selected by such two architects) that the Premises can
     be made tenantable within such 120-day period or neither Landlord or Tenant
     elects to terminate the Lease despite the extent of damage, then the
     provisions below apply.  If the Premises are damaged by fire or other
     casualty that does not render it wholly untenantable or require a repair
     period in excess

                                     -19-
<PAGE>

     of 120 days (as determined by the architects, or third architect, as the
     case may be), Landlord shall, with reasonable promptness (provided that
     insurance proceeds are made available by Landlord's lender), repair the
     Premises to the extent of Landlord's Work.

          18.3.  Waiver of Recovery.  Landlord and Tenant hereby waive all
                 ------------------
     rights of recovery against the other and its respective officers, partners,
     members, agents, representatives and employees for loss or damage to its
     real and personal property kept in the Building Complex.  Each party shall,
     upon obtaining the property damage insurance required by this Lease, notify
     the insurance carrier that the foregoing waiver is contained in this Lease
     and use reasonable efforts to obtain an appropriate waiver of subrogation
     provision in its insurance policies.

          18.4.  Abatement of Rent.  Rent shall abate during any period of
                 -----------------
     repair and restoration in the same proportion that the part of the Building
     Complex rendered untenantable bears to the whole.


          19. CONDEMNATION.  If the entire Building Complex is taken by right of
     eminent domain or by condemnation (which includes a conveyance in lieu of a
     taking), this Lease, at the option of either Landlord or Tenant exercised
     by notice to the other within thirty (30) days after the taking, shall
     terminate and Rent shall be apportioned as of the date of the taking.
     Tenant shall forthwith surrender the Building Complex and all interest in
     this Lease.  If less than all the Building Complex is taken, Landlord shall
     promptly repair the Building Complex as nearly as possible to its condition
     immediately prior to the taking (provided that the remaining portion of the
     Building Complex shall be suitable for Tenant's business thereat, as
     reasonably determined by Tenant (with the caveat that if any portion of the
     Building is taken, Landlord shall have no obligation to repair and restore
     the Building).  Landlord shall receive the entire award or consideration
     for the taking, other than with respect to the value of any Tenant's
     leasehold improvements paid for by Tenant (which award or consideration
     therefor shall be payable to Tenant).


          20. DEFAULT BY TENANT.

          20.1.  Events of Default.  Each of the following events is an "Event
                 -----------------
     of Default":

               (1) Any failure by Tenant to pay when due any installment of Rent
     or Taxes after five (5) business days' prior written notice (provided,
     however, that Landlord shall not be

                                     -20-
<PAGE>

     required to deliver any such notice to Tenant on more than two (2)
     occasions during any calendar year).

               (2) Commencement by Tenant of a proceeding under any provision of
     federal or state law relating to insolvency, bankruptcy or reorganization
     ("Bankruptcy Proceeding") or the commencement of a Bankruptcy Proceeding
       ---------------------
     against Tenant, unless dismissed within sixty (60) days after such
     commencement.

               (3) The insolvency of Tenant or execution by Tenant of an
     assignment for the benefit of creditors; the convening by Tenant of a
     meeting of its creditors for purposes of effecting a moratorium upon or
     extension or composition of its debts; or the failure of Tenant generally
     to pay its debts as they mature.

               (4) Tenant fails to perform any of its other obligations
     hereunder and non-performance continues for thirty (30) days after notice
     by Landlord or, if such performance cannot reasonably be performed within
     such 30-day period, Tenant does not in good faith commence performance
     within such 30-day period and diligently proceed to completion.

               (5) Tenant fails to provide an estoppel certificate or a
     subordination agreement in form and substance required in Section 22 hereof
     (to Landlord's mortgagee), each within the time periods provided herein.


          20.2.  Remedies of Landlord. If an Event of Default occurs, Landlord
                 --------------------
     may then or at any time thereafter:

               (1)  (a) Upon such notice as is required by Applicable Laws and
     pursuant to all legal requirements, reenter and repossess the Building
     Complex and expel Tenant and those claiming through or under Tenant and
     remove the effects of both without being deemed guilty of any manner of
     trespass and without prejudice to any remedies for arrears of Rent or
     preceding breach of this Lease.  Should Landlord reenter or take possession
     pursuant to legal proceedings or any notice provided by Applicable Law,
     Landlord may, from time to time, without terminating this Lease, relet the
     Building Complex or any part, in Landlord's name but for the account of
     Tenant, for such periods (which may be greater or less than the period
     which would otherwise have constituted the balance of the Term) and on such
     reasonable conditions and terms (which may include reasonable concessions
     of free rent and alteration and repair of the Building Complex) as
     Landlord, in its sole and reasonable discretion, determines and

                                     -21-
<PAGE>

     Landlord may collect the rents therefor. Landlord shall not be responsible
     or liable for failure to relet the Premises, or any part thereof, or for
     any failure to collect any rent due upon such reletting, except to the
     extent of any mitigation requirements of Applicable Laws. No such reentry
     or repossession or notice from Landlord shall be construed as an election
     by Landlord to terminate this Lease unless specific notice of such
     intention is given Tenant. Landlord reserves the right following any
     reentry and/or reletting to exercise its right to terminate this Lease by
     giving Tenant notice, in which event this Lease will terminate as specified
     in such notice.

               (b) If Landlord takes possession of the Building Complex without
     terminating this Lease, Tenant shall pay Rent which would be payable if
     repossession had not occurred, less the net proceeds, if any, of any
     reletting of the Building Complex after deducting all of Landlord's
     reasonable expenses incurred in connection with such reletting, including
     all repossession costs, brokerage commissions, attorneys' fees and
     alteration and repair costs (collectively, "Reletting Expenses"). If, in
                                                 ------------------
     connection with any such reletting, the new lease term extends beyond the
     Term or the premises covered thereby include other premises not part of the
     Building Complex, a fair apportionment of the rent received from such
     reletting and the Reletting Expenses will be made in determining the net
     proceeds received from the reletting.  In determining such net proceeds,
     rent concessions will also be apportioned over the term of the new lease.
     Tenant shall pay such amounts to Landlord monthly on the days on which the
     Rent would have been payable if possession had not been retaken, and
     Landlord is entitled to receive the same from Tenant on each such day; or

               (2) Provide Tenant with notice of termination of this Lease on
     the date therein specified and, on such date, Tenant's right to possession
     of the Building Complex shall cease and this Lease will terminate (except
     as to Tenant's liability as hereafter provided) as if the expiration of the
     term fixed in such notice were the end of the Term. If this Lease
     terminates pursuant to this Section, Tenant shall remain liable to Landlord
     for damages in an amount equal to the Rent which would have been owing by
     Tenant for the balance of the Term, less the net proceeds, if any, of
     reletting of the Building Complex by Landlord after deducting Reletting
     Expenses.  Landlord may collect such damages from Tenant monthly on the
     days on which the Rent would have been payable if this Lease had not
     terminated and Landlord shall be entitled to receive the same from Tenant
     on each such day.  Alternatively, if this Lease is terminated, Landlord, at
     its option, may recover forthwith against Tenant as damages for loss of the
     bargain (and not as a penalty) an amount equal to the worth

                                     -22-
<PAGE>

     at the time of termination of the excess, if any, of the Rent reserved in
     this Lease for the balance of the Term over the then Reasonable Rental
     Value of the Premises for the same period, plus Reletting Expenses,
     discounted by the rate equal to the Prime Rate (hereinafter defined) plus
     1%. "Reasonable Rental Value" is the amount of rent Landlord can obtain for
     the remaining balance of the Term.

          20.3.  Cumulative Remedies.  Suits to recover Rent and damages may be
                 -------------------
     brought by Landlord, from time to time, and nothing herein requires
     Landlord to await the date the Term would expire had there been no Event of
     Default or termination, as the case may be. Each right and remedy provided
     to either party in this Lease is cumulative and non-exclusive and in
     addition to every other right or remedy now or hereafter existing at law or
     equity, including suits for injunctive relief and specific performance.
     The exercise or beginning of the exercise by one party of one or more
     rights or remedies shall not preclude the simultaneous or later exercise by
     such party of other rights or remedies.  If any suit is brought because of
     an alleged breach of this Lease, the prevailing party shall be entitled to
     recover from the other party all reasonable attorneys' fees and costs
     incurred in connection therewith.

          20.4.  No Waiver.  No failure by either party to insist upon strict
                 ---------
     performance of any provision or to exercise any right or remedy upon a
     breach thereof, and no acceptance by Landlord of full or partial Rent
     during the continuance of any breach by Tenant, constitutes a waiver of any
     such breach or such provision, except by written instrument executed by the
     non-defaulting party.  No waiver shall affect or alter this Lease, but each
     provision hereof shall continue in effect with respect to any other then
     existing or subsequent breach thereof.

          20.5.  Bankruptcy.  Nothing contained in this Lease limits Landlord's
                 ----------
     right to obtain as liquidated damages in any bankruptcy or similar
     proceeding the maximum amount allowed by law at the time such damages are
     to be proven, whether such amount is greater, equal to or less than the
     amounts recoverable, either as damages or Rent, referred to in any of the
     preceding provisions of this Section.

          20.6.  Late Payment Charge.  Any Rent not paid within five (5)
                 -------------------
     business days after the due date shall thereafter bear interest at two (2)
     percentage points above the Prime Rate until paid. Further, if such Rent is
     not paid within five (5) business days after notice, Tenant agrees that
     Landlord will incur additional administrative expenses, the amount of which
     will be difficult to
                                     -23-
<PAGE>

     determine; Tenant therefore shall also pay Landlord a late charge for each
     late payment of 3% of such payment. Any amounts paid by Landlord to cure a
     default of Tenant which Landlord has the express right (but not the
     obligation) to do hereunder, shall, if not repaid by Tenant within five (5)
     business days of demand by Landlord, thereafter bear interest at two (2)
     percentage points above the Prime Rate until paid. "Prime Rate" means that
     rate announced by Wells Fargo Bank, N.A. as its prime rate on the date
     closest to the date interest commences.


          21.  DEFAULT BY LANDLORD.  In the event of any alleged default on the
     part of Landlord, Tenant shall give notice to Landlord and afford Landlord
     a reasonable opportunity (not to exceed thirty (30) days) to cure such
     default or, if such default cannot be cured within that time, such
     additional time as may be necessary provided, within such 30-day period,
     Landlord commences and diligently pursues a cure.  A copy of such notice
     shall be delivered in the manner required in this Lease to any  holder of a
     mortgage and/or deed of trust affecting all or any portion of the Building
     Complex (collectively, "Mortgagee"), provided that prior to such notice
                             ---------
     Tenant has been notified in the manner required in this Lease (by way of
     notice of Assignment of Rents and Leases or otherwise), of the name and
     address of the Mortgagee.  Mortgagee shall have thirty (30) days following
     notice from Tenant to cure any default by Landlord hereunder or, if such
     default cannot be cured within that time, such additional time as may be
     necessary provided, within such 30-day period, Mortgagee commences and
     diligently pursues a cure (including commencement of foreclosure
     proceedings if necessary to effect such cure).  Tenant's sole remedy will
     be equitable relief or actual damages, and Landlord or any Mortgagee shall
     not be responsible for consequential damages or lost profits incurred by
     Tenant as a result of any default by Landlord.  If a Mortgagee, or
     transferee under such Mortgage (hereafter defined), succeeds to Landlord's
     interest as a result of foreclosure or otherwise, such party shall not be:
     (i)liable for any default, nor subject to any setoff or defenses that
     Tenant may have against Landlord; (ii) bound by any amendment (including an
     agreement for early termination) without its consent made at any time after
     notice to Tenant that such Mortgage requires such consent; and (iii) bound
     by payment of Rent in advance for more than thirty (30) days.  Tenant
     agrees to pay Rent (and will receive credit under this Lease) as directed
     in any Mortgagee's notice of Landlord's default under the Mortgage reciting
     that Mortgagee is entitled to collect Rent.  The liability of Landlord to
     Tenant for any default by Landlord under the terms of this Lease shall be
     limited to the interest of Landlord in the Building, and Tenant agrees to
     look solely to such interest for

                                     -24-
<PAGE>

     recovery of any judgment from Landlord, it being intended that Landlord
     shall not be personally liable for any judgment or deficiency.

          22. SUBORDINATION AND ATTORNMENT.  This Lease at Landlord's option
     will be subordinate to any mortgage, deed of trust and related documents
     now or hereafter placed upon the Building Complex (including all advances
     made thereunder), and to all amendments, renewals, replacements or
     restatements thereof (collectively, "Mortgages"), provided that the holder
                                          ---------
     of any Mortgage provides Tenant with a written non-disturbance agreement
     pursuant to which (i) Tenant's use and possession of the Building Complex
     shall not be disturbed in the event of any Landlord's default under the
     Mortgage; (ii) Tenant's rights under this Lease shall not be reduced, or
     obligations increased, as a result of any modifications to this Lease as
     may be required by any such holder(s); and (iii) such holder shall not be
     liable for any default, nor be subject to any setoff or defenses that
     Tenant may have against Landlord.


          23. HOLDING OVER.  If, after the expiration or termination of this
     Lease, Tenant remains in possession of the Building Complex without a
     written agreement as to such holding over and continues to pay rent and
     Landlord accepts such rent, such possession shall be a tenancy from month-
     to-month, subject to all provisions hereof but (unless Landlord and Tenant
     are conducting good-faith negotiations for an extension of the Term) at a
     monthly rent equivalent to 150% of the monthly Rent paid by Tenant
     immediately prior to such expiration or termination. Rent shall continue to
     be payable in advance on the first day of each calendar month.  Such
     tenancy may be terminated by either party upon not less than thirty (30)
     days' notice prior to the end of any monthly period.  Landlord shall not be
     obligated to accept any holdover rent from Tenant and if Landlord does not
     accept such rent from Tenant, Tenant shall be responsible for all direct
     costs actually incurred by Landlord resulting from such failure by Tenant
     to timely vacate the Building Complex.


          24. ESTOPPEL CERTIFICATE.  Upon not less than ten (10) business days'
     written notice to the other as specified hereunder,  Landlord and Tenant
     each shall execute and deliver to the other party a written statement
     certifying that this Lease is unmodified and in full force and effect (or,
     if there have been modifications, that the same is in full force and effect
     as modified stating the modifications); that there have been no defaults by
     Landlord or Tenant (or, if there have been defaults,

                                     -25-
<PAGE>

     setting forth the nature thereof); the date to which Rent has been paid in
     advance; and such other information as each party reasonably requests.
     Landlord's or Tenant's failure to timely deliver such statement shall be
     conclusive upon such party that: (i) this Lease is in full force and effect
     without modification except as may be represented by Landlord or Tenant, as
     applicable; (ii) there are no uncured defaults in Landlord's or Tenant's
     performance, as applicable; and (iii) not more than one (1) month's Rent
     has been paid in advance.


          25.  RIGHT TO CANCEL.  Tenant shall have a one-time right to cancel
     this Lease effective any time after the ninetieth (90th) month following
     the Commencement Date (the "Cancellation Date") subject, however, to the
                                 -----------------
     following conditions:  (i) Landlord must receive written notice of such
     cancellation (the "Cancellation Notice") not later than the last day of the
                        -------------------
     seventy-eighth (78th) month following the Commencement Date, (ii) the
     Cancellation Date must be set forth in the Cancellation Notice and (iii)
     Tenant must pay to Landlord (concurrently with Tenant's delivery of the
     Cancellation Notice) an amount equal to the unamortized cost of Landlord's
     paid brokerage commissions plus Landlord's Contribution as of the
     Cancellation Date, amortized at the rate of ten (10%) percent per annum
     over a period of 126 months.  In the event that Tenant fully complies with
     the terms of this Section 25, the Lease shall expire on the Cancellation
     Date as if such date were the Expiration Date (without prejudice, however,
     to the rights and remedies of either party against the other under any of
     the provisions of this Lease in effect prior to the Cancellation Date).


          26.  RIGHT OF RENEWAL.

          26.1.  Options.  Provided that Tenant is not then in default hereunder
                 -------
     beyond applicable notice and cure periods, Tenant (and any Permitted
     Transferee, but no other party) shall have two (2) successive options to
     extend the Term, each such option being for a period of five (5) years.
     Such options shall be exercised by Tenant notifying Landlord in writing
     thereof at least twelve (12) months prior to the end of the then-current
     Term.  The exercise of each such option shall, without the necessity of
     additional documentation, automatically extend the Term of this Lease,
     except that:  (i) there shall be no additional option to extend the Term
     after the termination of the second option; and (ii) the applicable Base
     Rent payable by Tenant during such extended Term shall be at ninety five
     (95%) percent of the then-current "Market Rent".

                                     -26-
<PAGE>

          26.2.  Determination of Market Rent.  The Market Rent shall be
                 ----------------------------
     proposed by Landlord (the "Landlord's Proposed Market Rent") to Tenant
     within ten (10) days after Landlord receives each notice from Tenant that
     Tenant elects to extend the Term.  The Landlord's Proposed Market Rent
     shall be the Market Rent unless Tenant  notifies Landlord, within ten (10)
     days of Tenant's receipt of the Landlord's Proposed Market Rent, that
     Landlord's Proposed Market Rent is not satisfactory to Tenant ("Tenant's
                                                                     --------
     Rejection Notice").  If the Market Rent is not otherwise agreed upon by
     ----------------
     Landlord and Tenant within fifteen (15) days after Landlord's receipt of
     Tenant's Rejection Notice, then the Market Rent shall be determined by the
     following appraisal procedure.

          26.3.  Appraisal Procedure.  Tenant shall provide Landlord with notice
                 -------------------
     specifying the name and address of a real estate broker (or brokerage firm)
     designated by Tenant (the "Tenant's Appraisal Notice").  Within five (5)
                                -------------------------
     days after receipt of Tenant's Appraisal Notice, Landlord shall notify
     Tenant of the name and address of a real estate broker (or brokerage firm)
     designated by Landlord.  Within ten (10) days after the designation of the
     second broker, such two (2) brokers shall attempt to reach agreement as to
     the determination of the Market Rent.  If such brokers shall concur in such
     determination, they shall give notice thereof to Landlord and Tenant and
     such concurrence shall be final and binding upon Landlord and Tenant.  If
     such brokers shall fail to concur as to such determination within said ten
     (10) day period, they shall give notice thereof to Landlord and Tenant and
     shall immediately designate a third broker (or brokerage firm).  The third
     broker (or brokerage firm) shall conduct such hearings and investigations
     as he, she or it may deem appropriate within ten (10) days after the date
     of his, her or it's designation.  If none of the determinations of the
     brokers varies from the mean of the determinations of the other brokers by
     more than ten percent (10%), the mean of the determinations of the three
     (3) brokers shall be the Market Rent for the Building Complex.  If, on the
     other hand, the determination of any broker varies from the mean of the
     determinations of the other two (2) brokers whose determinations are
     closest in number by more than ten percent (10%), then the average of the
     determinations of the two (2) closest brokers shall be the Market Rent.
     The determination of the brokers, as provided above, shall be conclusive
     upon the parties and shall have the same force and effect as a judgment
     made in a court of competent jurisdiction.

     All of the foregoing brokers shall be real estate brokers who shall have
     had at least seven (7) years continuous experience in the business of
     leasing commercial real estate in the area of

                                     -27-
<PAGE>

     Troy, Michigan. Each party shall pay fees, costs and expenses of the broker
     selected by it pursuant to this Section 26 (and its own counsel fees) and
     one-half (1/2) of all other expenses and fees of any such third broker.

          27.  RIGHT OF FIRST OFFER TO PURCHASE.  If, at any time during the
     Term, Landlord intends to sell the Building Complex to a third party (other
     than to an affiliate of Landlord), Landlord shall afford Tenant with a one-
     time right of first offer to purchase the Building Complex.  At such time,
     Landlord shall notify Tenant of such intention and advise Tenant of its
     asking price and the proposed closing date (the "Offering Notice").  Within
                                                      ---------------
     thirty (30) days after Tenant's receipt of the Offering Notice (which shall
     constitute Landlord's offer to sell the Building Complex on such terms),
     Tenant shall have the right to accept such offer and to purchase the
     Building Complex from Landlord, and shall communicate its acceptance by
     notice delivered to Landlord.  Landlord and Tenant shall negotiate in good
     faith to reach agreement as to the sale/purchase of the Building Complex.
     In the event Tenant has not accepted Landlord's offer to purchase the
     Building Complex within the time period provided above, this right of first
     offer shall terminate.  However, in the event any of such proposed
     financial terms are modified by more than ten (10%) percent within a period
     of one hundred twenty (120) days subsequent to the delivery of the Offering
     Notice to Tenant, Tenant shall be afforded another opportunity to evaluate
     the proposed transaction and to accept and/or negotiate such revised terms.
     If Tenant has waived its rights under this Article 27 and Landlord sells
     the Building Complex to a third party (other than to an affiliate of
     Landlord), the provisions of this Article 27 shall be deemed null and void
     upon the consummation of such sale.


          28. NOTICE.  All notices or other communications required or desired
     to be given to Landlord or Tenant must be in writing and shall be deemed
     received when delivered via nationally recognized overnight courier or on
     the third (3rd) business day after deposit in the United States mail,
     postage prepaid, certified or registered, return receipt, requested,
     addressed as set forth in Sections 1.5 and 1.10 hereof.  Either party may
     designate in writing served as above provided a different address to which
     notice is to be mailed.


          29. BROKERAGE.  Landlord and Tenant represent that they have not
     employed any broker with respect to this Lease and have no knowledge of any
     broker's involvement in this transaction except those listed in Section 1.2
     hereof (collectively, the "Brokers").
                                -------

                                     -28-
<PAGE>

     Each party shall indemnify the other against any expense incurred by the
     other party resulting from a breach of such representation. The Brokers
     shall be paid a brokerage commission by Landlord pursuant to a separate
     agreement between Landlord and such Brokers.


          30.  MISCELLANEOUS.

          30.1.  Transfer by Landlord.  The term "Landlord" means, so far as
                 --------------------
     obligations of Landlord are concerned, only the owner of the Building
     Complex at the time in question and, if any transfer of title occurs,
     Landlord herein named (and in the case of any subsequent transfers, the
     then grantor) shall be automatically released from all obligations of
     Landlord thereafter to be performed provided that the transferee has
     expressly assumed all of Landlord's obligations hereunder.

          30.2.  Reentry by Landlord.  During business hours on business days,
                 -------------------
     and following reasonable prior written notice and in the presence of
     Tenant's representative, Landlord or Landlord's agents may enter the
     Building Complex for examination and inspection, or to perform such
     repairs, replacements, additions or alterations as Landlord is required to
     perform hereunder.  Subject to the foregoing, Landlord may also show the
     Building Complex to prospective tenants (during the last twelve (12) months
     of the Term), and to purchasers and mortgagees.  Landlord shall not
     unreasonably interfere with Tenant's use or occupancy of the Building
     Complex during any such entry.  Upon reasonable prior notice to Tenant,
     during business hours and in the presence of Tenant's representative(s),
     Landlord shall have the right of access to the Building Complex in order to
     perform any of its obligations as provided hereunder.  In the event of any
     emergency, Landlord shall have the right of access to the Building Complex
     at all times provided that Landlord had made all reasonable efforts to
     notify Tenant of such emergency (including telephone contact) prior to
     Landlord's entry in response thereto.

          30.3.  Signage.  Tenant, at its expense, shall have the right to (i)
                 -------
     install signage at or on the Building Complex and (ii) install its logo or
     name on the Building's monument sign (as currently contracted for
     construction), in both cases subject to approval by Landlord (not to be
     unreasonably withheld, delayed or conditioned) and the City of Troy.

          30.4  Roof Communications.  Tenant shall have the right, at its
                -------------------
     expense, to install and maintain, on the roof of the Building (behind the
     parapet at a location designated by Tenant, but

                                     -29-
<PAGE>

     subject to the reasonable prior approval of Landlord), communications
     equipment for use in connection with Tenant's business operations, together
     with cables extending from such equipment to the Premises (collectively,
     the "Rooftop Facility") to the Premises. Tenant shall have sole
          ----------------
     responsibility and liability with respect to the Rooftop Facility's
     compliance with: (i) the roof warranty (if any, a copy of which has been
     provided to Tenant) and (iii) any law, regulation, ordinance or zoning
     imposed by any governmental body having authority over the Property.
     Tenant's installation of the Rooftop Facility shall comply with the
     provisions of Section 13.1 hereof. The Rooftop Facility shall be considered
     as part of the Premises and subject to all applicable terms of the Lease.
     The installation of the Rooftop Facility shall be performed by a licensed
     structural engineer (or such other engineer as may be approved by Landlord
     in writing) and in accordance with plans and specifications approved by
     Landlord and all applicable governmental authorities. Tenant shall be
     solely responsible for maintaining all insurance, licenses and permits for
     the Rooftop Facility and its operation. Tenant, at its expense, shall cause
     the Rooftop Facility to be screened from view by the public with screening
     processes and materials reasonably approved by Landlord. Tenant shall have
     the right of access to the Building's rooftop in order to perform
     maintenance on the Rooftop Facility; provided that such access to the
     Building's rooftop shall, except in the case of emergency, be upon prior
     written notice to Landlord and Landlord shall have the right to have a
     representative present. Upon termination of this Lease for any reason,
     Tenant, at its expense, shall promptly remove the Rooftop Facility and
     restore any damage to the Building's roof caused by such installation and
     removal. Tenant hereby agrees to indemnify Landlord against any damage
     caused to the Building (including any damage to other tenants in the
     Building) which result from Tenant's installation or removal of the Rooftop
     Facility. This provision shall survive termination of this Lease.

          30.5.  No Merger.  The termination or mutual cancellation of this
                 ---------
     Lease will not work a merger, and such termination or cancellation shall
     not either terminate subleases or operate as an automatic assignment to
     Landlord of such subleases.

          30.6.  Validity of Provisions.  If any provision is invalid under
                 ----------------------
     present or future laws, then it is agreed that the remainder of this Lease
     is not affected and that, in lieu of each provision that is invalid, there
     will be added as part of this Lease a provision as similar to such invalid
     provision as may be possible and is valid and enforceable.

                                     -30-
<PAGE>

          30.7.  Captions.  The caption of each Section is added for convenience
                 --------
     only and has no effect in the construction of any provision of this Lease.

          30.8.  Construction.  The parties waive any rule of construction that
                 ------------
     ambiguities are to be resolved against the drafting party.  Any words
     following the words "include," "including," "such as," "for example," or
     similar words or phrases shall be illustrative only and are not intended to
     be exclusive, whether or not language of non-limitation is used.

          30.9.  Applicability.  Except as otherwise provided, the provisions of
                 -------------
     this Lease are applicable to and binding upon Landlord's and Tenant's
     respective successors and assigns. Such provisions are also considered to
     be covenants running with the land to the fullest extent permitted by law.

          30.10. Acceptance of Keys, Rent or Surrender.  No act of Landlord or
                 -------------------------------------
     Tenant or its representatives during the Term, including any agreement to
     accept a surrender of the Building Complex or amend this Lease, is binding
     on the applicable party unless such act is by a partner, member or officer
     of such party, as the case may be, or other party designated in writing by
     such party as authorized to act therefor. The delivery of keys to Landlord
     or its representatives will not operate as a termination of this Lease or a
     surrender of the Building Complex.  No payment by Tenant of a lesser amount
     than the entire Rent owing is other than on account of such Rent nor is any
     endorsement or statement on any check or letter accompanying payment an
     accord and satisfaction.  Landlord may accept payment without prejudice to
     Landlord's right to recover the balance or pursue any other remedy
     available to Landlord.

          30.11. Non-Reliance.  Tenant confirms that it has not relied on any
                 ------------
     statements, representations or warranties by Landlord or its
     representatives except as set forth herein.

          30.12. Written Modification.  No amendment or modification of this
                 --------------------
     Lease is valid or binding unless in writing and executed by the parties.

          30.13. Recording.  Tenant shall not record this Lease.
                 ---------

          30.14. Governing Authority.  This Lease shall be interpreted in
                 -------------------
     accordance with the laws of the State of Michigan (without regard to its
     conflict of laws principles).

                                     -31-
<PAGE>

          30.15. Authority.  Landlord and Tenant represent to each other that
                 ---------
     the execution and delivery of this Lease has been duly authorized and
     approved by all requisite action and that the individuals signing this
     Lease below have been duly authorized and empowered to do so on behalf of
     the respective parties

          30.16. Effectiveness.  This Lease is not effective unless and until
                 -------------
     execution and delivery by both Landlord and Tenant.


          31. EXHIBITS.  Any Exhibits referred to herein and attached hereto are
     incorporated herein by reference.


          32. WAIVER OF JURY TRIAL.  Tenant and Landlord waive any right to a
     trial by jury in suits arising out of or concerning the provisions of this
     Lease.


          IN WITNESS WHEREOF, the parties have executed this Lease as of the
     date first above written.


                              Landlord:
                              --------

                              TROY DEVELOPMENT #1, LLC


                              By: /s/ non legible
                                 ----------------------------
                                 Name:
                                 Title:  Authorized signatory



                              Tenant:
                              ------

                              SIEMENS AUTOMOTIVE CORPORATION


                              By: /s/ Lynn Johnson
                                 ----------------------------
                                 Title: EXEC. V.P. & CFO


                              By: /s/ John Sanderson
                                 ----------------------------
                                 Title: V.P. & G.M.


                                     -32-
<PAGE>

                                   EXHIBIT A

                              THE BUILDING COMPLEX


     A part of the N.E.  1/4 of Section 17, T.2N, R.11E., City of Troy, Oakland
     County, Michigan, being described as:  Commencing at the N.E. corner of
     Section 17; thence S. 02' 34' 54" E., 1088.10 feet along the Easterly line
     of said Section 17; thence S. 87' 25' 06" W., 827.92 feet to the point of
     beginning; thence S. 02' 34' 54" E., 413.36 feet to a point on the
     Northerly line of "Merihill Acres Subdivision No. 4", as recorded in Liber
     234 of Plats, Pages 35 through 38, Oakland County Records; thence S. 87'
     17' 06" W., 402.28 feet along said Northerly line to a point on the
     Easterly line of "Merihill Acres Subdivision No. 2", as recorded in Liber
     187 of Plats, Pages 11 through 13, Oakland County Records; thence along
     said Easterly line and its extension thereof on a curve to the right 557.26
     feet, said curve having a radius of 1768.01 feet, central angle of 18' 22'
     15" and a long chord bearing of N. 24' 31' 08" W., 554.88 feet; thence
     along a curve to the left 98.28 feet, said curve having a radius of 240.00
     feet, central angle of 23' 27' 49" and a long chord bearing of N. 66' 40'
     10" E., 97.60 feet to a point on the Southerly line of Investment Drive
     (Formerly Corporate Drive) (86 feet wide); thence the following two (2)
     courses along said line (1) along the arc of a curve to the left 373.70
     feet, said curve having a radius of 493.00 feet, central angle of 43' 25'
     53" and a long chord bearing of S. 70' 51' 57" E., 364.82 feet and (2) N.
     87' 25' 06" E., 179.38 feet to the point of beginning.


                                     -33-
<PAGE>

                                  EXHIBIT B-1

                                LANDLORD'S WORK


As part of the core/shell, Base Building improvements include the following:

          1.   Two (2) elevators for Tenant's use.
          2.   Men's and Women's restrooms on each floor.
          3.   Drinking fountain in common corridor on each floor.
          4.   Electrical/telephone closets on each floor.
          5.   Building stairways and enclosures, including doors.
          6.   Electrical equipment room on each floor.
          7.   Sheetrock core walls, perimeter and interior columns and exterior
               walls above and below the windows taped, spackled and ready for
               painting.
          8.   Primary HVAC duct loop from the roof mounted HVAC units around
               the Building core and 50 perimeter fan-powered boxes connected to
               the medium pressure duct loop.  Low pressure duct work and
               diffusers located on the perimeter of the Building (as drawn on
               the existing plans) shall be a part of Tenant finish.
          9.   A fire sprinkler system with turned up sprinkler heads at a
               density of approximately one head per 150 square feet.
          10.  First floor lobby, second and third floor elevator lobby
               finishes.

In the event of a conflict in the above listed description, the Base Building
documents shall prevail.

Based on Tenant's interior design, Tenant shall have the reasonable right to
select alternative colors of paint and carpet in the first floor lobby and other
common areas.

The term "Base Building Construction Documents", as used in this Lease, shall
refer to all of the documents set forth on the Drawing Log dated (revised)
December 23, 1999:

                                     -34-
<PAGE>

                                  EXHIBIT B-2

                                 TENANT'S WORK

Tenant will deliver a fully set of construction plans and specifications to
Landlord for Landlord's approval (not to be unreasonably withheld or delayed).
Landlord's Contribution is based upon the following Building Standards:

          1.   The Building standard HVAC system includes one (1) interior
               cooling zone per approximately 1,000 rentable square feet.
               Building standard includes a VAV box, ductwork, four (4) standard
               diffusers and one (1) thermostat.

          2.   The Building standard fire protection system includes one (1)
               sprinkler head per approximately 150 rentable square feet (1:150
               rsf) installed in an evenly distributed grid.

          3.   The Building standard lighting is one modular wire, three lamp,
               18-cell parabolic light fixture per approximately 80 rsf (1:80
               rsf).

          4.   The Building standard ceiling system is a 2' x 4' acoustical grid
               with second look lay-in ceiling tile.

          5.   The Building standard door is a 3080 pre-finished plain sliced
               white oak, solid core wood door mounted in a KD frame.  The
               hardware is Yale locksets.

The term "Tenant's Work", as used in this Lease, shall mean all construction
work to be completed by Tenant in accordance with the Final Plans to be approved
by Landlord pursuant to the provisions of Section 5.2 hereof, as contemplated by
the following Schematic Design drawings dated December 9, 1999 and Mechanical
Design drawings dated December 14, 1999 (copies of which have been approved and
initialed by Landlord's and Tenant's representatives):

     -    Ground, Second and Third Floor Partition Plans
     -    Ground, Second and Third Floor Furniture Plans
     -    Ground, Second and Third Floor Reflected Ceiling Plans
     -    Lobby Elevations and Section Details
     -    Color Perspective Rendering of Ground Floor Lobby

                                     -35-
<PAGE>

                                 EXHIBIT C

                        BUILDING RULES AND REGULATIONS

1. Tenant, upon the termination of its tenancy, shall deliver to Landlord the
keys to all doors within the Building, and in the event of loss of any keys
shall pay Landlord the cost of resetting each applicable lock.

2. If Tenant requires telegraphic, telephonic, burglar alarm or similar services
other than those approved in the Tenant Plans for the initial Tenant Work, it
shall first obtain, and comply with, Landlord's instructions in their
installation. Landlord, or its agents, will direct the electricians as to where
and how the wires may be introduced, and without such direction, no boring or
cutting for wires will be permitted. Any such installation and connection shall
be made at Tenant's expense.

3. Tenant shall not place a load upon any floor which exceeds the load per
square foot which such floor was designed to carry and which is allowed by law.
Landlord shall have the right to prescribe the weight, size and position to all
equipment, materials, furniture or other property brought into the Building.
Heavy objects shall stand on such platforms as determined by Landlord to be
necessary to properly distribute such weight. Business machines and mechanical
equipment belonging to Tenant which cause noise or vibration which may be
transmitted to the structure of the Building or to any space in or outside the
Building to such a degree as to be objectionable to Landlord shall be placed and
maintained by Tenant, at Tenant's expense, on vibration eliminators or other
devices sufficient to eliminate noise or vibration. The persons employed to move
such equipment in or about the Building must be acceptable to Landlord. Landlord
will not be responsible for loss of or damage to, any such equipment or other
property from any cause, and all damage done to the Building by maintaining or
moving such equipment or other property shall be repaired at the expense of
Tenant.

4. Tenant shall not use any method of heating or air conditioning other than
that supplied by Landlord or approved as part of the Tenant's Plans approved by
Landlord for the initial Tenant's Work. Tenant shall not waste electricity,
water or air conditioning.  Tenant shall keep corridor doors closed.

5. Tenant shall be responsible for all persons for whom it requests passes or
card keys and shall be liable to Landlord for all acts of such persons. Landlord
shall not be liable for


                                     -36-
<PAGE>

damages for any error with regard to the admission to or exclusion from the
Building of any person.

6. No cooking shall be done or permitted by any Tenant on the Premises, except
in accordance with all applicable federal, state and city laws, codes,
ordinances, rules and regulations.

7. Tenant shall not use in any space or in the public halls of the Building any
hand trucks except those equipped with the rubber tires and side guards or such
other material-handling equipment as Landlord may approve. Tenant shall not
bring any other vehicles of any kind into the Building, with the exception of
the designated drive-in area on the first floor of the Building as may be
permitted by all applicable laws, regulations and codes.

8. These Rules and Regulations are in addition to, and shall not be construed to
in any way modify or amend, in whole or in part, the terms, covenants,
agreements and conditions of any lease of premises in the Building.

9. Landlord reserves the right to make such other and reasonable rules and
regulations as in its judgment may from time to time be needed for safety and
security, for care and cleanliness of the Building and for the preservation of
good order in and about the Building. Tenant agrees to abide by all such rules
and regulations in this Exhibit C stated and any additional rules and
regulations which are adopted.

10. Tenant shall be responsible for the observance of all of the foregoing rules
by Tenant's employees, agents, clients, customers, invitees and guests.

                                     -37-
<PAGE>

                                 EXHIBIT D

                           COMMENCEMENT CERTIFICATE
                           ___________________, 2001

SIEMENS AUTOMOTIVE CORPORATION


     Re:  Lease dated as of January ___, 2000 (the "Lease"),
          by and between TROY DEVELOPMENT #1, LLC  and
          SIEMENS AUTOMOTIVE CORPORATION


Dear Tenant:

     With regard to the referenced Lease, Landlord and Tenant acknowledge the
following (initially capitalized words not otherwise defined have the same
meaning set forth in the Lease):

     1.   In accordance with Section 5.3 of the Lease, the Commencement Date is
12:01 a.m. __________, and the Expiration Date is 12:00 midnight ________.

     Please acknowledge the foregoing by having an authorized officer sign this
letter in the space provided below and return the same to our office. Facsimile
signatures shall be binding as original signatures.

TROY DEVELOPMENT #1, LLC
a Colorado limited liability
company

By:
   ----------------------------
   Authorized signatory


Acknowledged and Agreed
this ____ day of ___________________:


SIEMENS AUTOMOTIVE CORPORATION

By: /s/ Lynn Johnson
   ----------------------------
   Name:  LYNN JOHNSON
   Title: EXEC. V.P. & CFO

By: /s/ John Sanderson
   ----------------------------
   Name:  JOHN SANDERSON
   Title: V.P. & G.M.



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