will a new regulator fix this?
I have a similar but different problem. My front driver side window will sometimes not roll down. This usually happens after I have rolled it all the way up and the car is turned off. If I leave the window cracked the problem occurs less frequently, but will still randomly occur. When the window exhibits this problem, using the switch I can still roll it up to the top, but pushing the switch down has no effect (no clicking, motor noise, etc).
The only way I have found to fix this problem is by disconnecting the cars battery over night. Without fail, this will (temporarily) fix the issue and my driver's side window again works as expected.
I've had various electrical problems with the car including a bad Central Convenience Module that fails to respond in VAG (and which I have not yet replaced). Does anyone know if my problem is more likely the sign of a bad window regulator, or bad CCM?