Hello municipality, so I have a nice 645, which is also a lot of fun. E63 645ci, built in 2004, hand switch with the N62B44 engine. Now to the problems: When I drive with the vehicle and the engine is warm, it tends to jerk. It comes in idle also to ignition oscillations or combustion oscillations, if one stops. But if the air mass meter is pulled off, then the problem is gone. I assume that the valvetronics definitely cannot be the problem, right? Is it possible that it is also the air mass meter?