Germany warned over Opel aid

The European Commission yesterday sent a warning to Germany on the provision of state aid to General Motors&rsquo; European arm Adam Opel, whose future may hinge on billions of euros in funding from the German government.<br /><br /> Aid that served national interests could breach European rules, the commission said. The commission&rsquo;s comments came after questions about whether Opel&rsquo;s funding could be conditional on keeping German manufacturing plants open.<br /><br /> The German government has offered state-backed guarantees to the winning bidder for the firm. Rivals Magna and RHJ International hope to buy the firm.