Hello all,
I had a problem with my w220 (diesel). Alternator seemed not to be charging the battery. (voltage to low<11 V)
Today I have charged the battery.
Started the car and the voltage over the battery poles was around 14 V with running engine.
Now I suspect I have an alternator problem. Loose contacts, worn brushes or something like that.

Does anyone now of a way to check/replace the brushes without taking the alternator out first?
Or are there suspect point for intermittent contacts?
Reason for this question is that taking out the alternator is a terrible job because it is a watercooled one and I would have to disconect loads of tubes and let away the cooling fluid..

 

I would also check the voltage regulator before taking the alt. out.

 

Hello srknutson.
will try to do that.
(after finding out how to take it away without taking out the alternator)