Quote:
Originally Posted by Graham
The '85 300D and probably most benzes of that era don't exactly have a limit switch. What they have, is a thermal overload switch. If the button is held down too long or if there is excessive friction in the mechanism or window, then this switch can trip.
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In my experience, the switch opens almost concurrently with the window reaching the extreme limits of its travel. When raising the window, for example, you can hear the motor stop within a fraction of a second of the window stopping in the UP position. Subsequent depressions of the switch on th UP side will result in the motor attempting to run for a fraction of a second, then stopping.
Quote:
Originally Posted by Graham
After it cools down, it should reset. But not always!
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It appears to me that the switch cycles almost instantly.