Geez, Gilly knows his stuff! Do you work for a dealership?
I was going to say that the wheel sensors sound like the culprit since the problem is intermitant and because it is actually applying the brakes. Usually, if it is a control unit, the system seems to be totally inoperative and the only symptom is the light on in the cluster.

__________________
Andrew
300e 294,000mi
380sel 185,998mi
380se 309,980mi