If I open the driver’s side window about one-third to let some air in and then want to close it again (after about 1–1.5 minutes), the window tries to open fully. If I stop it and try to close it again, it continues to open. Once it is fully open, it can be closed again.
From page 1 of this thread, I have only read your first post, so I’m not fully up to speed on the topic.
Could it be that the automatic follow-up when opening/closing, probably called “comfort opening/closing,” is activated in the MIB, and that the partial (one-third) opening of the window just barely passed the point where the comfort opening starts to work, causing the door control unit to “choke”? In that case, maybe try to…
Fensterheber neu anzulernen. Possibly the activation point for the trailing run is no longer precisely defined in the control unit.
Bold theory, but a possibility if this hasn’t already been mentioned.
Control unit defective (that can happen quickly, speaking from experience) would be the next possibility, but only if relearning doesn’t help.