Ok I was totally wrong then. I'd find out what the dealer uses and who makes them, then get Phil to find the OEM equivalent. Another popular online MB parts place has the Sachs/Boge struts listed as OE for the car, at a reasonable price. In any event I'd get the HDs for the front due to the weight. I know you'd rather have Bilsteins as the forum has everybody trained to only accept them and for good reason. However if Bilstein doesn't make it you have no other choice than to get whatever's available. Not exactly building a space shuttle here. I've had KYBs on a car and found them to be acceptable.

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'02 BMW 325i
'85 300D 450k
'93 190E 2.6 170k(killed by tree)
'08 Ducati Hypermotard 1100S 6k
'06 Ducati S2R800 14k(sold)