2003 Mercedes Benz C230

Electrical problem
2003 Mercedes Benz C230 4 cyl Two Wheel Drive Automatic 30000 miles

My doughter's C230 Kompressor 2 door coupe
wipers work continuosly without stop once you
started the car. The relays ( both of them seems to
be OK. I tried to disconnect rain sensor but it didn't
help, wipers still on. Could be switch?
June 8, 2010.

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