European Commissioner in charge of Competition Neelie Kroes delivers a speech at a conference on State Aid Private Enforcement in Brussels October 19, 2009. Germany has assured GM and the Opel Trust that its 4.5 billion euros ($6.70 billion) offer in financial aid for Opel is not tied to the choice of an investor or a plan, European Commission spokesman Jonathan Todd said on Monday. Kroes raised concerns in a letter to the German government last week about German government aid that is to be provided to Opel under a planned sale of the carmaker to Canada's Magna.