Hello, I drive a 630i convertible built in 2006. At the moment I have quite irregular the problem that the engine has drop-outs ( the car is jerking ). But it only goes a certain time, then also the yellow motor lamp goes on, after some time it runs completely normal again and the motor lamp is out again. The reading did not result in a dial message. I have already replaced the ignition coils and the zünkerzen are checked. Greeting Edmar