Update on the ASD Light - after resetting it with OVP repaired, it has not come back on .... on the other hand, trhe triangle light does not illuminate during startup, either.
Tach and AC are working normally - can't tell if ASD is working, yet ... may pull dash to see if bulb is functional.
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg