roubaud 6/13/2012I've heard this is a common issue because of the turbo, and is no big deal. The bigger deal is when it shakes after warmed up when parked and idling. That's the cylinder head, which is a faulty design and will have to be replaced (I just did it via a re-machined head at Metric Motors in CA). You can read a lot about this on MB forums online. Fun fun. Cost me $2500 but purrs like a kitten now.