Ive searched all i can find are much different then my situation. I get a thump or clunk sound from thr rear i think passenger side. This ONLY happens when im Stopped and in Drive it stops doing it in Nuetral. Car drives perfectly no noise or vibrations. No sounds or clunking over bumps or dips. Only happens at a Stop and in Drive. Tanny shifts smooth and perfect as well slow or hard acceleration. Im kinda lost on this i cant figure out whats causing the sound. I have a 2007 E550 4Matic if any of that helps.