As I recall when doing the shocks for my 1998 C230 the OEM comfort shock was only available from the dealer and was made by Sachs.

For less money I went with the Bilstein HD's, but with 100k miles on the car a softer more luxurious ride would have been nicer when cruising with a passenger.

On many highways the expansion joints do send more of a jolt through the chassis in comparison to the original shocks as best I can compare.