Good day, parish, once again I have to burden you with a problem and hope to find someone who already knows this or similar problem and knows how to fix it. For about a week I have had the problem that the car shakes quite strongly if you have to keep it in idle mode somewhere, be it a traffic light, intersection or driveway. The switch knob jumps quite far back and forth (2 centimeters in every direction) and you feel that you have already poured many times Since THE MOTOR CONTROLLEUCHTE did not show me any indication of any errors (has not even lighted up – but works), I started from the spark plugs. However, they are already changed (except for one that I somehow can not get out, sits too tight). The only difference was that the car now starts louder and ignites faster, but that was already it. Unfortunately, the problem with the wobble engine is not fixed. When I just went into the garage after that I got behind the car (engine was still running) and I noticed a rather stalling exhaust. What makes me so stubborn is that the engine is shaking at idle, but the speed does not change, it remains constant on the spot (mostly so slightly over 500 revolutions, sometimes a little higher). From around 1200 revolutions the vibration / wobble then stops. The air mass meter is only new, before that the MKL had given me false air values. gt, after I changed the thing, the lamp was then permanently out again. Where do I have to / can I still check? What do the signs of engine and exhaust indicate?