I had this when the brushes wore and one wasn't touching the alternator commutator ring. I was far from home on Christmas Eve in a blizzard, with the wife and little critters in the 4matic, so, ....

The State Police car PUSHED my 3year old Mercedes into the fire station, I pulled the regulator assembly with my pocket knife for a screwdriver, stretched the braided brush wires a little and re-installed (while the Firemen ate some of the food we were taking to the in-laws and the young-uns toured the fire trucks).

The alternator charged and all lights went off and it worked for a week until the new regulator assembly arrived.

Wish I had photos.

__________________

Gone to the dark side

- Jeff