After I have tried everything to solve my problem, see my other post “bad gas acceptance….”, I bought a used ECU 0215456832 from VDO 412232/001/012. Unfortunately, the engine no longer starts.With Carsoft is no error in the error memory, however, he has still stored the old ECU. I found nothing in the net that suggests that the ECU has to be learned. What do I do wrong? Must the “new” ECU be learned will be ? can only be done with STAR ? thanks mfg. Manfred