A6 window problem

[Steve R]

Any reported problems with the rear window regulators on 03 A6. My fathers car was outside for a week and could not get both windows up. . I pulled the car into a warm building for a few hrs. Didn't see any water under the doors and it didnt feel like an obstruction. It felt more like an electrical problem than something frozen. The windows would go up half way and then reverse whicjh is normal if there is resistance. I muscled them up the rest of the way. Temps have been in the teens. No problem with my allroad. 

Ideas, list?

Out of curiousity, are the regs the same as in other models.