The ABS malfunction indicator comes on as soon as my 300E attains speed of about 5, 6 km/h then never goes off until ignition is off. I cleaned the speed sensors and checked their wires but still the problem remains.

Function of the ABS was also tested. Sudden brake was applied when my car was at speed. The car stopped without any lock and black trail behind. ABS seems normal except the brake pedal excessively pulsates when the car is at low speed, i.e. less than 5, 6km/h. Pulsation stops when the indicator comes on.

I suspect the OVP but except the above thing the car runs perfect.

Any thoughts?