Arthur,
Since I've only had w124s with the M103, I was poking around under the hood and noticed the following: the right hand strut & mount were typical but on top of the left mount there is a large soft rubber "pad", about the size of my hand, and a protruding pipe with a valve/knob on the top (sorry for the vague description). The car does not have ADS or pneumatic suspension according to the plate on the upper radiator support or the printout. This is the convertible, so it may be unique to that model; but do you know what this pipe/knob is? Thanks.

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87 300e (white/black; amg body kit)
88 300ce (red/cream; amg body kit)
93 300ce cabrio (white/blue/blue top)
93 300ce cabrio (black/grey/black top)
98 ml 320 (totaled @ 137,000 miles)
99 clk320 (black/grey/black top)