The US version of these vehicles had a self-leveling suspension but only in the rear. The Euro versions have it on all four corners.
The self-leveling hydropneumatic suspension can be very costly to replace. If the ride is very bumpy and stiff than you can assume that the nitrogen spheres need to be replaced. The hydraulic struts can run a pretty penny to replace. The spheres can run about $150 each (there are 5 of them total). The struts run about $300-$400 each. You should only need to replace them if you see that they are leaking the hydraulic fluid.
If you do a search about the hyrdopneumatic suspension you will probably hear some people talk about how inexpensive these vehicles can be purchased here in the US. Someone stated that you can find many of them sitting in junkyards resting on the tires cuz the spheres have gone flat and nobody wants the hassle with them.
I'm going to invest the $$ and replace the spheres and struts in mine. I've heard that once you replace them, it is like gliding on air. We'll see.
Also, if you guys need info on the hydro-p suspension or a service manual email me at email@example.com
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