The 124 suspension seems to be tuned more for handling than ride.

On mine, I am in the process of replacing all of the rubber bits. I replaced all the links in the rear. On the front I have replaced the left strut, control arm, ball joint, strut mount, and sway bar bushings.

I have new tie rods, and everything for the right side. I bought boge / sachs struts for the front. My stuff is probably all original with 235,000 miles on it. At 175,000 it got a new steering stabilizing shock, and an idler arm repair kit.
I also need to put in the bilstien rear shocks I bought from a member of the forum.

Then next year I will put in new flex discs and center support bearing.

At this point, it should be almost like new.

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes