The front drivers side window on my 98 V70 came off it's track and will not go up properly. It's really hard to get at the mechanism but it seems that a plastic slide in the operating arms is bent or broken. The window goes down OK but goes up crooked and has to be forced into alignment by hand. It then will slip open a bit. Any advise or ideas? This is not a switch problem - it's mechanical.

Thanks,
Joe