Excuse the hi-jack, please.

Guys, my mother's 300 E has for a few yrs lit its ABS light upon cold start-ups - very seldomly, maybe once every 2 months.
It would light for a few seconds during which time the engine would stumble at around 500 rpms. A quick rev used to sort it out quickly. More recently it would happen on a weekly basis, but now the car would stall and would have to be restarted and revved a few times to get it going. The light only ever comes on upon start-up. Otherwise its running fine with a new alternator and battery.

Could it be the voltage regulator or what?
Its due for its 250 000kms lube service and I want to ask the mech to replace whatever you guys think is necessary or could rule it out.

Thanx a mill

__________________
1991 500 SE Euro (w126) 72k m - Pearl Grey/Mushroom
1991 300 E Euro 150k m - Zircon Silver/Mushroom
1976 450 SE Aus 180k m - Classic White/Brown