I have searched the posts for hints on dash rattles and I haven't seen the one that I have. Mine comes from the interaction between the windshield defrost vent (mainly driver's side) and the dash. It is most present when its cold and I don't have the defrost on, when I put it on it heats up and goes away. When I press on it, it goes away. Its such an hard spot to get at, any body else have/fix this problem?