Often the wire loom from A-pillar to door breaks And usually the driver's door. That causes a lot of problems, as these are connected with the GM.
Here is the eba for electric windows, there you can see how to unlock the plug between door and A-pillar https://bmweba.com/eba-01-29-9-786-757/amp/

Reparatur meiner Türkabelbäume http://www.7-forum.com/forum/showthr...t=118598&page= this is a pdf, you might need to register there first to open the file
http://www.7-forum.com/forum/showthr...e=#post1211542