My front roof vent lid took a hike for the second time since I've owned my TC. It vibrates open while driving in spite of being tightened down and then shakes itself to pieces. This one is most like...
Same problem here with opening by itself. Cranked ours shut so hard broke the plastic crank handle-still opened! Replaced the handle and several thousand miles later still stays shut unless we open-and we do every night summer and winter (a little) to let out humidity. Can't explain why.