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Old 06-30-2009, 10:25 AM   #3 (permalink)
FAR888
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Date registered: Mar 2007
Vehicle: '02 ML55 AMG
Location: Sierra Leone, West Africa
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Quote:
Originally Posted by Witek_M View Post
Why motor? Switch reverses polarity of current going to the motor to make it turn one way or the other. If it goes one way then motor is fine. Replace switch group and then check current consumption.

Please, update your profile with model, production date and location.
Indulge me Witek.

Isn't it possible the motor has become weak and is okay when coming down, with the help of gravity, but not so strong when trying to raise the window?
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