I think my rear shocks on my car are going bad due to the body roll and the feeling of no dampering from the shocks, also I have a feeling that the car has a hydraulic shock but there is nothing about this in the repair manual. Does any know of an easier method that can also fix this problem? & Where is the hydraulic pump & reservoir located?
I don't know if it applies, but I can tell you what it is on a 123 body wagon.
It used Nitrogen balls in the automatic leveling system. Keep in mind that I sold this car in 1996 after almost 300,000 miles, so I can't remember if I also needed to replace the rear struts or not, but I do know that I had to change the balls.
Chances are very good that these have failed.
The older wagons used hydraulic fluid and a pump to control ride height in the rear. The reservoir was white, and had steel lines coming out of the top of it. It was in the engine compartment, left side (driver's side) in front of the wheel well if I remember correctly.
HI THERE, YOU STILL HAVE THE PROBLEM ? OK ALL WAGONS HAVE SELF-LEVELING SUSPENSION REGARDLESS THE ARE OLD. YOU HAVE 2 AIR CELLS OR WHAT THEY CALL HYDROLIC SELF LEVELING SUSPENSION. IF THIS ARE BAD YOU GOT TO REPLACE THEM. THEY ARE LOCATED UNDERNEATH THE REAR SEATS GOTTA TAKE THEM OUT.THEN YOU WIL SEE 2 COVERS BOTH LEFT AND RIGHT SIDES TAKE THEM OFF AND YOU'LL SEE THEM. BUT DON'T DO IT YOURSELF HAVE A BENZ MECHANIC DO IT . THEY ARE COSTLY SPECIALLY WHEN IT COMES TO SELF LEVELING SUSPENSION.
There is one more thing that fails in the TE rear suspension and that is the little shear pin in the pump. The front of the power steering pump has a little high pressure hydraulic pump built into it and if it over loads, there is a little roll pin that shears off rather than fail the steering.
I took mine apart and found the pin easy to replace and stuck the whole thing back together again without a gasket set. It creeped me out not to have replacement seals but it worked fine and hasn't leaked or failed in three years.