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Old 10-06-2010, 04:02 AM
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Join Date: Apr 2010
Location: Cyprus
Posts: 226
Windows working slow

My front windows in a 94 124 Coupe are winding up and down slowly.
It feels/looks like maybe something needs lubrication.

Can someone let me know if there is anything I should be doing to them as part of servicing?


Smoke Silver 1994 E220 Coupe Automatic
0 kilometers 6 September 1994
100,635 kilometers - 6 September 2010
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Old 10-06-2010, 04:07 AM
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Join Date: Jun 2006
Location: Chandler, Arizona
Posts: 3,523
No servicing...Motor could be getting tired or the wiring is beginning to fray in the door jam. Apply a 12V battery to the motor directly and see what speed it goes down. If it is faster than usual you can assume the wiring is beginning to get increasing resistance. I am no electrician though.
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Old 10-06-2010, 11:18 AM
hey_allen's Avatar
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Join Date: May 2006
Location: Tacoma, WA
Posts: 728
I know the w126 window regulators do require occasional cleaning and lubrication, though it's often neglected.

Some of the later models have a speed check for window closing speed as part of their inspection, which would imply servicing the mechanism if the windows didn't close at the proper rate.

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