There are 2 carbon brushes on the volt. reg. for the car mentioned in the first post.

- Safely elevate front end of car. Just enough to get underneath and at the bottom/back side of alternator. You may have a large plastic shroud underneath that needs to be removed.

- Back of alt. - there are 2 phillips screws. Remove and slip out of volt.reg.
New brushes are 1/2" long, so this may help you get an idea how worn down yours are.

I just went thru this with a non-MB car and it turned out to be worn brushes in the alt. Voltage readings looked ok @ idle, but still got idiot lights, especially on hard acceleration.

Take a look at the brushes on your volt. reg.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"