Thanks for all the responses. I dont have a mercedes battery. I have a Walmart battery. I will check the water on it. I'm surprised you guys think the brushes are ok on the regulator. They were worn down around half the size of a new one. They had steep concaves and the brushes were not even. I wish I could narrow it down to the battery, regulator or alternator, so I dont waste money. Maybe I should disconnect the battery and bring it to autozone? Will they do a free charging and test? I would not mind buying an alternator replacement for $107 from Autozone BUT it seems like a big job to switch them out

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1993 Benz-190E-2.6 liter