Maxwell,
I was told the comforts are for a nice ride and get a little softer over the first 10K of use and then stabilize. The HD's are pretty firm, good if you live in a place with crappy roads like Rhode Island. Again I was told the HD's start pretty firm, almost un-MB, but then break in to slightly more taught than the comforts are when new. Hope this helps. This info from a local MB guy... FWIW, when I "bounce" the 300D with the new Bilsteins it returns to ride height and just stops. Very taught. RT

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84' Mercedes Benz 300D Anthracite/black, 171K
03' Volkswagen Jetta TDI blue/black, 93K
93' Chevrolet C2500HD ExCab 6.5TD, Two-tone blue, 252K