Drove to work this morning and tryed to open the sunroof (let the smoke out cause windows don't work) It had frozen somewhere cause when i opened it, it made a dirty great noise. Now, it still works fine, slides back and forth and tilts, but it doesn't "click up" in the final closed position. I had a look but i couldn't find any plastic pieces broken off or anything. Before i broke it, when it was shut, you couldn't move it at all, but now when it's shut, you can push the sunroof up and down with your hand about 3-4mm. Would i need a new mechanism or is there a cheap way of fixing it? It's ge