If your engine mounts look like mine, you definitely need new ones. The "arms" are riding on the metal shell of my mounts, I'm sure the engine shocks are gone, and I shudder to think what the tranny mount looks like.

You also certainly have collapsed front subframe mounts, get them replaced. It will raise the front of the car an inch or more, and eliminate the "wander" on the highway, too.

I'd also bet the flex disk is dead, too, although they don't seem to die so fast on these cars -- the one on my 220D is still good, but sees only a quarter of the horsepower, at most! If it is, you will also get some thumps on downshifts.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!