Hello, I would like to help a friend who currently has the following problem: Vehicle: Porsche Panamera 3.0 Model 970, Diesel Key-Nr. 0583 AEV First registration: 26.02.2013 The vehicle opens and closes via the remote control, but if you turn the ignition key over, nothing happens, no matter which stage, everything remains dead. If you plug the key now with the ignition switched on and the battery plugs off and plugs again, everything goes on in the cockpit for about 3 seconds, ohh e Error messages etc. and after that everything goes out. Since you cannot perform such a diagnosis, he currently does not know any advice. In the workshop (not Porsche, but also the workshop of my trust), relays, cables, fuses, ECUs have already been checked. The engine control unit was also sent for repair on suspicion, with the result that everything is fine. Does anyone have any idea what to consider next?