please help as its driving me nuts!! i have a rattle that sounds like a loose scre, it sounds like its in middle of dash by the vents. iv took the clocks out and checked all the heater pipes are tight, it still rattles. could this be screws that hold the dash to the car and if so, where are they and how do i get to them? also, do these screws go through to the scuttle panel? thanks!