It's a while since I took mine off, but they are held in place by screws, the window winder if you have one, has abit of sprung loaded metal that you need to prise out from behind the winder. When it's all undone, it should just come off, just lift it upwards as it'll be held in place at the top. I can't remember if there's any popper stlye clips at the bottom, but they pull off if there is. You'll then just have any wiring connections left to undo.
Just have a good look round and you'll see what holds it on.