I've an irritating little rattle in front of the passenger seat which occurs at very low revs. It sounds as if it may be in the region of the air vent/dash. I checked the door trim which seems OK. I've removed the air vent & checked it, reassembled it & tightened the two screws; tried to check behind the vent area too. Haven't checked under the bonnet yet. Any thoughts or suggestions would be most welcome!