I don't know if applies to this model/year, but I have heard tales of the
front springs collapsing on Mercedes cars. What happens, so I believe, is
that the spring sits on a 'bearing block' which sits in the spring seat.
These components are made of dissimilar metals, and hence when they get wet,
they become an electric cell, and the components corrode and eventually
break. Worth sticking your head under and having a look.
The 6.9 does not have springs. They use hydroneumatic struts only.
Normally, all 4 corners should stay up. If one end drops prematurely, look for a
hydraulic oil leak
around the level valve area. There is one in the front and one in the rear. The
front one controls
both front struts. Unfortunately, MB put it under the ACC servo......
On one of these cars I used to own rear sag turned out to be from a lack of
hydraulic fluid. There is a reservoir under the hood behind the right hand
headlight assembly labeled "hydraulic fluid". Took me a few years to figure
out what it went to. Once I topped it off and ran it so the pump worked for
a while, the sag went away.
You can get the hydraulic fluid at a mercedes dealer, or I have had good
luck substituting DOT 4 brake fluid.
The front proportioning valve (can't remember the real name) could be
leaking internally. Mine does but the front only goes down after the car
has been lifted off the ground and then when you put it back down. Then
as the pressure builds up, it comes right up. These valves can be
rebuilt. Sucky part is the are mounted under the climate control servo.
at 02:29 AM, werner email@example.com (Werner) said:
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