Probably dead accumulators on the self leveling and bad links in the rear suspension allowing unwanted camber/caster changes on the rear wheels.

Have it inspected again to check for bad links -- probably need all of them on both sides plus an alignment.

Check for bad accumulators by bouncing the rear suspension by putting you knee or foot on the rear bumper. If the tires bulge, but the rear suspension doesn't move, replace the accumulators pronto -- if you don't, the strut seals will fail from the excess pressure, and they cost about $600 each. Accumulators are about $100 each, and the ride will be MUCH better with new ones.

Note that the self-leveling will work just fine with the accumultaors bad, but it will ride VERY hard, to the point the rear wheels bounce off the ground.

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!