Wiper Motor on 2000 Mercedes-Benz C230

I have a 2000 C230 Kompressor with wiper problems. When I turn on the wipers, the wipers will start from the driver side of the car and then stop on the far passenger side. I have added white lithium grease (learned it from a mechanic) to the wipers, cleaned the windshield and other things but have had no luck so far. One thing I have not done is remove the wiper cover and add additional white lithium grease to it. Any suggestions on what may be the problem, how to remove the wiper cover piece or anything. If it helps, the temperature outside is about 25 degrees and I thought that my be part of the problem. Any help to prevent spending $500 - $600 for a new motor would be greatly appreciated.

by in Conshohocken, PA on January 02, 2010
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2 answers
ANSWER by , January 16, 2010
This sounds like a motor problem, is that what you ended up finding?
ANSWER by , March 05, 2011
Too bad he didn't remove the cover and apply more lube to the piston. That's what it took to fix mine.