I am hearing a thumping sound from my right rear wheel whenever I hit a bump. I replaced the shocks (Bilstein HD's) a few months ago. I can't imagine that is the problem, but it sounds just like a dead shock. I crawled under there a few minutes ago and all the links and the shock seam tight.

No, there is nothing bouncing around in my trunk!!

What alse can it be??

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1996 (W210) E300D 86K - Traded in for a Lexus
1992 (W124) 300D 2.5 Turbo 202K - Sold
1983 (W123) 300D, 146K - Sold
1970 280S, 263K - Sold - Beginning of addiction

How tight did you tighten the nuts holding the upper mount down?

They should only be far enough down the shaft for a single thread to show over the top nut if you have two, and only an equivalent amount if you have a nylock nut. Much more, and all the resilience in the rubber is used up by the nut compressing the buffers, so you get a solid thump transmitted.

Very common mistake, I didn't know about it when I did the 220D, on top of using Gabriel shocks instead of Bilsteins.

On the other hand, if there is any play in the buffers, you will get a thump when the lower one hits the frame.

Speaking of which, you DID use Bilstein or Boge, didn't you? If not, that is the thump right there!

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!

Here are a vast array of possibilities....

http://www.peachparts.com/shopforum/search.php?action=showresults&searchid=472679&sortby=lastpost&sortorder=descending

Hey, guys. It turned out to be that the lower nut loosened. I thought that this was not suppose to happen with self locking nuts...

__________________
1996 (W210) E300D 86K - Traded in for a Lexus
1992 (W124) 300D 2.5 Turbo 202K - Sold
1983 (W123) 300D, 146K - Sold
1970 280S, 263K - Sold - Beginning of addiction