Opel, GM and the EU A spanner in the works Oct 19th 2009 From Economist.com Magna’s plans to acquire Opel, GM’s European arm, may face a problem AS THE week commences when General Motors is set to conclude a deal to sell Opel, its European arm, the American car giant finds that the European Union has thrown a spanner into the engine bay. Late on Friday October 16th the European Union’s com..