When driving my 300SD and I come across road conditions that compresses the shock it feels fine. When I come across a road condition the causes the wheel to drop fairly quickly and the shock to extend (like coming over a quick crest) I hear a thump which I assume is the shock fully extending.

Maybe extending to quick and little rebound?

I don't see leaks and don't know how many miles are on the current shocks and have no idea how to check gas charged shocks to see if they are up to snuff. It feels smooth otherwise.

Any ideas?

Thanks
Don

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1980 300TD-T (82 Turbo and Trans) 159,000 Miles "Jackie-O"
1983 300SD 272,000 Miles "Aristotle"
1987 Jeep Wagoneer Limited - keeps the MB's off the ice and out of the snow
1994 BMW 530it

I'd guess, if the ride is OK otherwise, what you are hearing is the tire hitting the far side of the hole -- MB valves the shocks so that the wheels move up easily, but drop fairly slowly. This keeps the tire in contact with the road better, and you don't get the pitching and crashing you get with American shocks -- valved exactly opposite to "control body roll". Roll is controlled by sway bars, not stiff shocks, but don't try to tell Detriot that.

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!