Hi, I will try to post a video of this.. Having sold my w210 and moved up to the w220 s500. I have enjoyed the car for 2 years with no issues other than the metal brake pipes which I replaced myself. Having recently replaced a top ball joint /full arm on one side and the steering rack end and track rod on the other, I'm still getting a knocking sound while driving on reasonable bumpy roads at slow speed. I have checked drop links so it's not them. If the video uploads, you will hear it. Otherwise you can find it on the w220 page on Facebook. Can't upload video. But will try to find another way to show it.