The seat springs and padding break down over time, causing a lean, tilt, or sag.
Resources for the Repair and Maintenance of your 1991 Mercedes-Benz 300D
1991 Mercedes-Benz 300D
1991 Mercedes-Benz 300D Problems
Due to wear of the internal drive gear, the speedometer can stop working.
A knocking noise from the front end can be caused by cracked strut tower bushings.
The bushings for the shifter lever wear out to the point where they break and fall out. This causes excessive movement (loose feel) in the shifter lever and a clanging-type noise when changing gears.
The engine wiring can degrade because the insulating material falls off leaving the bare wire exposed. This can cause many problems depending on which wires are exposed and what they touch.
1991 Mercedes-Benz 300D Questions and Answers
I was driving in snow the other day and it was slipping all over the place does it have a button for traction