the window doesnt always drop if the clips have broken... it happened to me on the way home from BVF on the weekend, window went up very slowly (with a clunk)...
i stripped it down and the one plastic clip had sheered and the other had a crack in it !!
window finally closed, but very slowly.
you can get the whole inner skin with runners on for around £70 from the stealers, its easier to change altogether rather than just the clips.
old one

new one fitted


the motor might be knackered but you'll only tell if you open it all up (its not that bad really)...
hope this helps a bit
