How do I fix my power window not working?
If you can't move any of the windows, the first place to look is at the fuse. Window regulators are high-current devices, and the fuse is sized to just barely be able to open all four windows together. Age and a few sticky window channels can pop a fuse. Turn the key to the Run position, but don't start the car. via
What does a VW window regulator do?
What does the window regulator do? Just like manual windows, power windows need a mechanism that will control the upward/downward movement of the glass piece. The window regulators in your Volkswagen do just this – they are responsible for controlling the up/down movement of the windows. via
How do I remove a window regulator Rivet? (video)