Same thing happened to mine last week, can't fix it in place so I'm going to take the whole arm rest off and try to fix it out of the car. To take it off you take the rear ashtray out and there are fixings underside of the armrest. They are allen key bolts and I've had to tighten them previously when the rest became loose. Be prepared, they are a right b@stard to get at, you need the hands of a 1 year old, three wrists and two elbows..........