I've got the same problem on mine after someone tried to lever the top of the door open. It can be removed, there are small nuts and bolts which are visible once you have removed the plastic trim around the inside of the door/window frame. And some screws which are visible once you pull the rubber window seal out from around the top. The ones at the bottom are a bit tricky to get off with the window glass still in. as far as repairing goes, it depends what has happened. On mine, the little spot welds holding the black metal outside trim onto the shiney metal inner window guide have been broken. Doesn't look like there is much that can be done for it, as the frame has been bent slightly. If the welds are all in tact, which I suspect they aren't if the black frame is sitting proud, but if they are, you might be able to reclamp it into line with the nuts/bolts/screws. From what I remember. the price of the trim is around £90. I still need to replace mine as it is glued and taped at the moment, and does look cr*p