We have a problem with the ASD light on a 1994 E300D . It's the trianglular light with exclamation point in the middle of the speedometer. It goes on at precisely 55 mph and stays on at higher speeds but goes off when speed drops below 55 mph again. We tried tires, the ABS/ASD Computer, the ASD control Module, the rear speed sensor, the over load voltage relay and also temporarily bypassing the brake switch. Any Ideas?
Thanks, Bubba