Had this annoying rattle / noise / vibration sound coming from within the centre of the dash , finally extracted a digit and went searching for it today . Got it sorted , it was the vent control unit , a screw had fallen out so put a new one in , had some sponge in the shed so cut it up and taped and tied it near the problem area which is right behind the double din radio and test drive - all good . happy motoring once more .