Hello guys, my Pro Ceed ED Bj 2008 has been a problem for a few weeks. It doesn’t start sporadically every few days. The whole thing is expressed by turning the key quite normal and on the display the yellow lamp of the immobilizer permanently lights up. Normal goes out directly and the engine starts, however, if the error occurs you can roll forever and nothing happens except that the starter turns. Sometimes it remembers after several attempts, sometimes not. An hour late But it starts the car again immediately. From your experience, what can that be? I first suspected the transponder in the key, but unfortunately the error occurs with both keys, which is why I would rule it out. Maybe someone has an idea here before the huge sums in the workshop become due for the diagnosis alone. So sporadic mistakes are always somewhat tedious to find.