Remove/Install
Mercedes-Benz W123 door panel removal/window motor replacement
(youtube)
Motor Rebuild
https://www.peachparts.com/shopforum/diesel-discussion/318503-repair-your-failed-w124-window-regulator-motor-maybe-others-too-2.html
https://www.ifixit.com/Guide/How+to+fix+Mercedes+W123+%22screw+open%22+style+window+regulator/20483
Otter Overload Device
https://www.peachparts.com/shopforum/2956911-post17.html
https://www.peachparts.com/shopforum/2956367-post16.html
part #s
W123 Window Motor RH Side 14 Teeth Bosch 0130821021