Hi It sounds like the window regulator. I had the same problem myself. It is pretty common on most electric windows, a coleague had the same prob with a BMW at work also an Audi. Sounds like it will need replacing if there is nothing physical stopping it from working.
The friendly Alfa Romeo Club - If you are looking to buy or you are already an Alfa Romeo owner, join alfaowner.com today to get the most from your ownership
