hi,i have had a creaking noise since owning the car, which i was convinced was coming from somewhere behind the dash.it was worse on warm sunny days with air con on.it was driving me nuts.i took the glove box out,had a poke around,nothing untoward .anyway,my wife was sat in the passenger seat recently,and straight away pointed to the plastic covering behind the rear view mirror.it was that all .the windscreen must have been transmitting the sound.can't believe it was that all along.happy days (for now!).hope this might help anyone else who gets tormented by squeaks and rattles.