COMERICA CAPITAL TRUST [II][III]

Certain Sections of this Guarantee Agreement relating to
Sections 310 through 318 of the
Trust Indenture Act of 1939

SECTION OF				SECTION OF
TRUST INDENTURE ACT				GUARANTEE AGREEMENT
310		(a)		4.1(a)
		(b)		4.1(c), 2.8
		(c)		Inapplicable
311		(a)		2.2(b)
		(b)		2.2(b)
		(c)		Inapplicable
312		(a)		2.2(a)
		(b)		2.2(b)
313				2.3
314		(a)		2.4
		(b)		Inapplicable
		(c)		2.5
		(d)		Inapplicable
		(e)		1.1, 2.5, 3.2
		(f)		2.1, 3.2
315		(a)		3.1(d)
		(b)		2.7
		(c)		3.1(c)
		(d)		3.1(d)
316		(a)		1.1, 2.6, 5.4
		(b)		5.3, 5.7
		(c)		8.2
317		(a)		Inapplicable
		(b)		Inapplicable
318		(a)		2.1(b)
		(b)		2.1
		(c)		2.1(a)

TABLE OF CONTENTS

		Page
ARTICLE I INTERPRETATION AND DEFINITIONS			1
SECTION 1.1. Interpretation			1
SECTION 1.2. Definitions			2
ARTICLE II TRUST INDENTURE ACT			5
SECTION 2.1. Trust Indenture Act; Application			5
SECTION 2.2. List of Holders			5
SECTION 2.3. Reports by the Guarantee Trustee			5
SECTION 2.4. Periodic Reports to the Guarantee Trustee			6
SECTION 2.5. Evidence of Compliance with Conditions Precedent			6
SECTION 2.6. Events of Default; Waiver			6
SECTION 2.7. Events of Default; Notice			6
SECTION 2.8. Conflicting Interests			6
ARTICLE III POWERS, DUTIES AND RIGHTS OF THE GUARANTEE TRUSTEE			6
SECTION 3.1. Powers and Duties of the Guarantee Trustee			6
SECTION 3.2. Certain Rights of Guarantee Trustee			8
SECTION 3.3. Compensation; Indemnity; Fees			9
ARTICLE IV GUARANTEE TRUSTEE			10
SECTION 4.1. Guarantee Trustee; Eligibility			10
SECTION 4.2. Appointment, Removal and Resignation of the Guarantee Trustee			10
ARTICLE V GUARANTEE			11
SECTION 5.1. Guarantee			11
SECTION 5.2. Waiver of Notice and Demand			11
SECTION 5.3. Obligations Not Affected			11
SECTION 5.4. Rights of Holders			12
SECTION 5.5. Guarantee of Payment			12
SECTION 5.6. Subrogation			12
SECTION 5.7. Independent Obligations			13
ARTICLE VI COVENANTS AND SUBORDINATION			13
SECTION 6.1. Subordination			13
SECTION 6.2. Pari Passu Guarantees			13

		Page
ARTICLE VII TERMINATION			13
SECTION 7.1. Termination			13
ARTICLE VIII MISCELLANEOUS			13
SECTION 8.1. Successors and Assigns			13
SECTION 8.2. Amendments			13
SECTION 8.3. Notices			14
SECTION 8.4. Benefit			15
SECTION 8.5. Governing Law			15
SECTION 8.6. Counterparts			15

     THIS GUARANTEE AGREEMENT, dated as of [*], [*], is executed and delivered by COMERICA INCORPORATED, a Delaware corporation (the Guarantor) having its principal office at Comerica Tower at Detroit Center, 500 Woodward Avenue, Detroit, Michigan 48226, and [Name of Property Trustee], a [*], as trustee (the Guarantee Trustee), for the benefit of the Holders (as defined herein) from time to time of the Capital Securities (as defined herein) of COMERICA CAPITAL TRUST [II][III], a Delaware statutory trust (the Issuer Trust).