Dear Leut, my 850 doesn’t start anymore and has been in the Volvo workshop for a few days. They have already switched ignition cables, candles and distribution cap and have ruled out a lot of things.Tass now already a lot of coal At the moment they assume that the engine control unit is defective.The Volvo workshop has kindly already picked out an Ebay link for a suitable control unit:http://www.ebay.de/…/271453803406?… However, the Asspartin (the v om Asspartin Used Parts Shop) warned that it would not be possible to exchange the ECU easily because of the immobilizer. But he was not quite sure. Do you know more about this?