2005 AUDI ALLROAD Power Trainautomatic Transmission Problems

OUR AUDI WAS PARKED IN OUR DRIVEWAY AS IT HAS BEEN FOR THE LAST TWO YEARS. OVERNIGHT THERE WAS A MODERATELY HEAVY RAIN. THE FOLLOWING MORNING AFTER STARTING THE CAR WE ATTEMPTED TO SHIFT INTO REVERSE BUT COULD NOT. THE CAR WAS TAKEN TO THE DEALER WHO REPORTED THAT WATER ENTERED THE COMPUTER WHICH CONTROLS THE TRANSMISSION AND SHORTED IT OUT. RAINWATER ALSO ENTERED THE MASTER BRAKE CYLINDER THOUGH A VENT HOLE. PARTS COST WILL BE IN THE $4400 RANGE AND LABOR $3-4000. WHILE THIS IS THE FIRST TIME THIS HAS HAPPENED TO US DISCUSSIONS WITH THE TOW-TRUCK OPERATOR, THE CAR RENTAL AGENCY NEXT TO AUDI, THE INSURANCE ADJUSTER AS WELL AS CONVERSATIONS WITH FRIENDS INDICATE THIS ?FLOODING? PROBLEM IS COMMON TO AUDI A4/A6 VEHICLES. THE CONSEQUENCES ARE FRIGHTENING! WE IMAGINE THE TRANSMISSION CEASING TO OPERATE AND /OR THE BRAKES FAILING WHILE DRIVING ON CROWDED I-95 BECAUSE OF RAINWATER CASCADING...