How to fix Mercedes W123 "screw open" style window regulator

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How to fix Mercedes W123 "screw open" style window regulator: crwdns2935265:00crwdnd2935265:01crwdnd2935265:02crwdne2935265:0

How to fix Mercedes W123 "screw open" style window regulator: crwdns2935265:00crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

Place the electric motor portion of the device over a container that can catch drips as you clean it.
Thoroughly spray the motor with electrical cleaner.

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