European Opel dealer association Euroda Thursday renewed its offer to take a stake in General Motors Corp.'s (GM) core European brand after the planned spin-off from its troubled parent company.

The association wants to provide up to EUR500 million, up from about EUR300 million previously, for GM's Adam Opel GmbH, a spokesman for the association told Dow Jones Newswires.

"We, as a medium-sized company, are ready to contribute to a rescue of Opel. Therefore we again call upon the German government to take our offer of EUR500 million seriously," Jaap Timmer, president of Euroda, said in a written statement.

Under the proposal, dealers would contribute EUR150 from the sale of each vehicle over a period of three years. The Euroda association represents 4,000 dealers with about 120,000 employees.

Company Web site: www.opel.com

-Frankfurt Bureau, Dow Jones Newswires; +49 69 29725 500; djnews.frankfurt@dowjones.com