Nothing is ever easy, Been hearing a "clunk" on closing the door recently so, as I had a new door lock and a free evening I thought I'd fix both. Turns out the clunk was from the window guide rail - bracket snapped where it is held onto the door by the red safety light. Anyway, it seems to just 'float' up against the upper rail despite the few slots that are visible. Can't really see or feel up there at all. Anybody ever replace one of these? know how it fits?

 

The top part of the guide slides into a slot up top. It can be a pain to get it to slide in.

 

Same problem hear i just deal with the noise i cant get my hands in there!