Once in a while when I back out of the driveway and pull forward I get a brief slight thumping and an slight unstable feeling which quickly goes away as the Car is straightened out.

Even less often it happens when I pull away from a curb.

Does not thump or feel different during cornering or when going over bumps or changing speed or gears.

When I get around to it I will do the checks in the below thread that some members posted.

In the mean time I would be interested in comments on symptoms of people who have had the worn trailing arm bushings.

Note that I have replaced the front Control Arm Bushings long time ago (totally rotted out) and I actually have the Bushings for the rear trailing arms but typically I don't know where I put them other then they are in a box with other Mercedes Parts that I previously bought.

http://www.peachparts.com/shopforum/diesel-discussion/111052-trailing-arm-bushing-w126-1985-300sd-diy.html

“Jack the wheel free of the ground and apply torque via a lug bolt with the parking brake set. If the wheel moves back and forth, bushings are shot. If not, check to see if the sway bar links are still present, if not, replace.”
In anther post.
“A twenty inch pry bar between body and trailing arm/bushing area gave me 4mm trailing arm movement
Close examination of bushing shows the rubber coming out one side.
The outside bushings on both sides are very bad.’

http://www.peachparts.com/shopforum/diesel-discussion/136824-thudthudthudthud-sound.html#post1010405

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84 300D, 82 Volvo 244Gl Diesel