THE VEHICLE WAS BEING ADJUSTED WHILE PARKING ALONG SIDE A CURB ON A HILL. THE DRIVER PULLED FORWARD, THEN ATTEMPTED TO STOP IN ORDER TO PUT THE CAR IN REVERSE TO GET CLOSER TO THE CURB, BUT THE BRAKE PEDAL WOULD NOT DEPRESS. THE CAR BEGAN TO ROLL DOWN THE HILL AND HIT THE BACK OF A PARKED SUV AND ENDED UP WEDGED UNDER THE BACK OF THE SUV. THE ENTIRE FRONT END OF THE VEHICLE WAS SMASHED, BUT THE AIRBAG NEVER DEPLOYED.