Moin, sometimes I have cars whose engine control unit is broken. Often it is “cold soldering points” or the electr. connections at the “Eprom”. Search specialists who can repair engine control units and “learn”. If someone knows such a specialist in Wolfsburg and near surroundings up to 50 km radius, I would be very grateful if I could get a tip or address. Also by PN here in the forum. Friendly greetingsGrützy