Not the same car, but I have a 95E320 that my wife was complaining about noises from the passenger seat. Push pull I couldn't find the culprit (with the wheels in the air.) Read a post about stabilizer links/bushings and then had my wife push the car up and down on a corner while I held the outer bushing and the sway bar moved 1/4" in the bushing. Swapped out the inners and outers for less than $40CAN and all the noise is gone. Check it out.
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