M120 V12 rough idle and vibration is this normal?, I have a Mercedes Benz W140 S600 with the M120 V12 engine., I know this engine is supposed to be very smooth, but mine has noticeable vibration at WHY YOUR CAR SHAKES WHEN IDLING If your car feels smooth while driving but starts vibrating or shaking at a stoplight, something isn't right. At idle, the engine runs at its This Is Why Your Car Randomly Shakes At Idle Even Without Warning Lights Read more: https: auvt.cc C6sakj Your car doesn't always tell you when something's wrong. Sometimes it whispers through subtle vibrations that Car making this loud vibrating noise while idling and driving, anyone know what could be the cause of this Jared Carr Facebook