How do I diagnose and fix a stuck window on my Audi 80?

My Audi 80's driver side window is stuck and won't roll up or down. How can I figure out the cause and repair it myself?

One potential cause for a stuck window on an Audi 80 could be a faulty window regulator. To check this, remove the door panel and inspect the regulator for any damage or wear. If necessary, replace the regulator.

Another possible cause is a broken window motor. You can test this by using a multimeter to check for power at the window motor connections. If there is no power, the motor may need to be replaced.

Sometimes, a stuck window can be caused by a simple issue like debris or dirt in the window tracks. Try cleaning the tracks with a lubricant and see if that helps.