Hello folks!

I need some help! My 300e started to idle that seems to shake and vibrate the whole car. There is a minimal shake on steering wheel.

I asked someone in a shop who specialize on MB if they can fix my rough idling by adjusting the idle nut (in which I believe all cars have) to get rid of it and said that there is no such thing.

This rough idling just happened recently and my first thought was to changed the spark plugs and wires thinking this will fix my it but did not.

Anyone experienced this and fixed it?