Dave:

I talked to Hans yesterday, and he suspects the OVP relay. It has several circuits, so some things can work and others not (like the 4-Matic).

If yours has a single fuse, it's old -- the new style has two fuses on top.

I'd replace it, they aren't too expensive.

Peter

__________________
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!