I doubt that there is any air in the system. The service manual says that it is self bleeding. I think the problem might be a lack of restriction in the hose leading between the accumulators and the strut. If you think about it there should be some restriction there to provide dampening. No restrictions, no dampening, car bounces. I know some cars using hydraulic suspension use a "leaky check valve" (best description I can come up with) to provide similar reactions like a shock absorber does. Rolls Royce for sure. It makes more resistance in one direction over the other. I have seen special restrictors inserted into hoses to provide certain flow characteristics. I dont know if that is how MB does it but you might check the flexible lines attached to the accumulators.

I really dont know how the flow is controlled but it seems to me there must be some mechanism. The only part that has a chance of doing that is the flexible lines if it is not built into the accumulators or the struts which I dont believe it is.

Let us know what you find out when its cured.

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I got too many cars!! Insurance eats me alive. Dave

78 Corvette Stingray - 3k
82 242 Turbo Volvo - Manual - 270k
86 300e 5 speed manual - 210k
87 420sel - 240k
89 560sl - 78k
91 420sel - 205k
91 560sel - 85k
94 GMC Suburban - 90k
97 Harley Davidson Heritage Softail - 25k
00 GMC Silverado 1 ton 30k