You did not mention if you had rideleveler, if so chech your fluid levels also.
Your car is a 300sel is that w126 ?
If so it more than likely has ride leveler, just check that before replacing shocks , could be cheaper.
regards
BB W123 wagon & 190e

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BB
W123 280Te 1982 Modified & still going
W210 190E 1990 (Wifes Car)
W116 350 se sold
W116 280 se sold