Talks over the future of General Motors Corp.'s (GM) Adam Opel GmbH unit Wednesday will end in a bridge financing agreement for the German unit, German Vice-chancellor and Foreign Minister Frank-Walter Steinmeier said Wednesday.

His comments come with General Motors at risk of filing for insolvency in the coming days and with the German government aiming to keep Opel afloat to allow more time for talks with potential investors.

"I am certain that we will wrap up tonight the state-backed bridge financing, this is necessary, Opel needs this air to breathe," Steinmeier told reporters.

Chancellor Angela Merkel, key cabinet ministers, governors of the German states with Opel plants, representatives from GM and the U.S. Treasury and the bidders for Opel are meeting in the chancellery Wednesday.

-By Andrea Thomas, Dow Jones Newswires; +49 (0)30 2888 4126; andrea.thomas@dowjones.com