DRIVER SIDE POWER WINDOW FAILED IN THE DOWN (OPEN) POSITION DURING HEAVY RAIN. A VERY FRAGILE PLASTIC CONNECTOR FAILED WHERE CONNECTED TO A CABLE. THE SERVICE MAN COMMENTED THAT THIS IS A VERY FREQUENT FAILURE ON THIS CAR. WINDOW CAME DOWN WHILE ON THE HIGHWAY AT 70 MPH. CAUSING MY COFFEE TO SPILL ON THE INTERIOR AND MYSELF. CADILLAC DEALER REPAIR COST FOR WINDOW IS $550.00. *JB