E420 ABS Pump Quirk - W124

[dproudfo]

Here's a quick question for everyone. Upon starting my car, after putting it into gear (D or R) and after rolling about 5 feet, the ABS pump buzzes for about a half a second and then goes away (without touching the brake pedal). It sounds (and feels) like the pump is having problems with its initial 'self-test' upon starting the car (or so I've concluded following a little research). Whether the car is warm or cold. I could drive the car for an hour, stop it and start it within a minute and the same symptom will occur.

I thought maybe air in the brake system so I bled the brakes last night but I didn't come up with anything. Also ran the codes on pins 6 (ABS) and 19 (DM) and they both came up clean.

Any advice on this one?