A FRIEND HAS A 1999 OR 2000 JETTA & HAS EXPERIENCED THE SAME PROBLEM FOUR TIMES. THE DEALER SAYS THIS HAS OCCURRED FOR THE PAST TWO YEARS IN JETTA MODELS & VW HAS YET TO RECTIFY IT. THE DEALER HAS HAD A STEADY STREAM OF JETTA'S TO FIX, DAILY. EVEN NOW, MY REPLACEMENT PART IS ON ESTIMATED TWO WEEK BACKORDER. I ASKED AN UNKNOWN TO ME, JETTA DRIVER @A STOPSIGN IF HE HAD THIS PROBELM & SAID ONE TIME. HE REPORTED HIS GIRLFRIEND'S JETTA HAD IT HAPPEN TWELVE(!) TIMES, & A LAWSUIT WAS PENDING. APPARENTLY THE PLASTIC PIECE HOLDING THE WINDOW FAILS IN AZ'S +100F HEAT. PLEASE ADVISE WHAT RECOURSE IS BEST TO PURSUE.*AK