My 1991 350SDL has ASD ... or used to.

I have been unable to find a troubleshooting guide or procedure for the "ASD Light On" fault. I assume the ASD is NOT working with the light on all the time - versus it flashing when the ASD does work in normal mode.

Can anyone help me with this? I hate guessing ... my final resort is simply to start replacing components - best guess would be the accumulator in the right rear of the car.

Help!

Thanks!

__________________
George Stephenson
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