I realise that there have been numerous threads on the internet about this, but was wondering if anyone will know what will have busted in my case. I leaned on a partly opened back window and it moved down just a bit, and since then has never gone back up by itself. I can open the window normally but it will not go up..(motor works) I can pull it up by hand and it will drop a few mm and stay there...
The other window on the other side (which was like that when I bought it) will not go down or up and the window physically moves when you press the regulator.
Anyway here is the most important question of the day...i may get some of the parts from a MK3 3 door golf and was wondering what parts are interchangeable with the rear doors of a 5 door golf...(i mean the whole window regulator along with all the motor tension wires, clips etc...(i suspect a clip has busted or it has fallen off...)
(please tell me that the whole thing is interchangeable and I will be very very happy)
I have no idea what has broken, but will post pictures tomorrow at some point and hope someone can tell me what parts need to be replaced...put back into place....or if I can use some ties to fix everything...

It looks pretty straight forward to remove the door covers as I see no external screws...the post for that on here is very good..
