I've got a 2007 A4 and love it, especially when I drive it through the Rocky Mountains. Yesterday my car developed what I hope is merely a small teething problem. The problem is when I go to close my driver-side window. When I quickly pull back on the window button and release so that it will continue to close on its own, the window will begin to close and then part way will stop and recede slightly. If I try it again the problem will occur a second time. After a third time the window will close.

Has anyone encountered this? If so, what was the fix?