I have a 01 audi a6 2.7 Quattro and when I tired to roll either of the back windows down they wouldn't go down. At first I thought it was something to do with the windows themselves but I could roll them down with the controls on the driver door. So when I looked into it I found that the window lock button is stuck in the on position. I figure I have to replace that switch but now the rear driverside window won't roll down at all. So is it possible that the window lock switch and just the rear driverside button on the driver door went bad? All other windows roll down with driver door controls. I haven't been able to find a place that sells the switches at a decent price and I don't want to spend a bunch of money if that's not the problem. Anyone's help is greatly appreciated.