HDs are significantly more firm than the OEM Sachs, but the MUCH better rebound control and lack of float, with increased feel and control, make for a much better experience. There IS a comfort shock, but most aftermarket suppliers only stock/push the HDs and Sports, because that's where the market is. Check bilstein.com and poke around; I promise you they have them.

FWIW, after 20k miles, my HDs did soften up a bit

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former: 83 300D, 97 C230, 93 400E

current: 08 C300 Luxury , 92 500SL