In Reply to: Vibrating noise from behind the dash posted by costasz on February 10, 2000 at 07:40:25:
It was a part which is supposed to stick up against the firewall behind the radio. Not sure what it is, but it fits into a little slot and it was out and vibrating like crazy. Removed the radio, poked around a bit. Taped it back in place and there's been silence ever since.
Alternative - take it to your dealer