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                                                                   Exhibit 23(a)


                        [ERNST AND YOUNG LLP LETTERHEAD]



                         Consent of Independent Auditors


         We consent to the incorporation by reference in the registration
statement on Form S-8 of Comerica Incorporated, pertaining to the registration
of $4,681,322 of deferred compensation obligations under the Comerica
Incorporated Deferred Compensation Plan (1997 Amendment and Restatement), of our
report dated January 22, 1997, with respect to the consolidated financial
statements of Comerica Incorporated, incorporated by reference in the Annual
Report on Form 10-K for the year ended December 31, 1996, filed with the
Securities and Exchange Commission.

                                                       /S/ Ernst & Young LLP

September 22, 1997











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