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 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 2008 Honda Civic Vibration during Idle and Deceleration 8th Generation Honda Civic Forum Why Your Car is Vibrating When Idle How to Fix It Does Your Car Shake at Idle but Smooth Out While Driving? Here's Why What causes this violent engine vibration at idle? The whole car shakes. It runs smoothly otherwise when over idle rpm. Timing chain?