In the Cabriolet/Convertible TT's once you open the door the window slides down about half an inch and when you shut the door it closes back up.

If the battery has been disconnected or you took this to a shop and it stopped working well it is very simple to get it back to work. Basically what happened is the memory of the windows has been lost and needs to be re-programmed.

1) Get in the car and leave the door open
2) Start the car
3) Make sure the window is all the way up
4) With the door open cycle the window 3 times, so Down then Up, Down then Up, Down then Up
5) On the third cycle, once the window closes, release the switch and then immediately pull it upwards and hold for 10 seconds.
6) release the switch and then open and close your door
7) Now the window has been programmed

Hope this Helps some of you with this little annoying issue. Please post if it worked for you, as i will try and find other solutions for the ones that have issues.

 

Happens on the coupes as well with the Mk I TT. Same fix works.