DETROIT, May 3 /PRNewswire-FirstCall/ -- Comerica Bank announced it will
increase its prime rate to 6.00 percent from 5.75 percent effective today,
May 3, 2005.

Comerica Bank is a subsidiary of Comerica Incorporated (NYSE: CMA), a
financial services company headquartered in Detroit, strategically aligned
into three major lines of business: the Business Bank, Small Business &
Personal Financial Services, and Wealth & Institutional Management.
Comerica's approximately 11,000 employees focus on relationships, and helping people and businesses be successful. Comerica Bank locations can be found in Michigan, California, Texas and Florida, with select businesses operating in several other states, Canada and Mexico. Comerica reported total assets of $53.5 billion at March 31, 2005. To receive e-mail alerts of breaking
Comerica news, go to http://www.comerica.com/newsalerts .

CONTACT: Media Contact: Wayne J. Mielke, 1-313-222-4732, or Investor
Contact: Helen L. Arsenault, 1-313-222-2840, both of Comerica Bank