THE VEHICLE WAS TRAVELING STRAIGHT FORWARD DOWN A FLAT THREE-LANE ROAD. THE VEHICLE WAS GOING ABOUT 45-50 MILES PER HOUR. THE DRIVER FELL ASLEEP AND IT CROSSED TWO LANES AND ROLLED MULTIPLE TIMES DOWN A 30 FOOT EMBANKMENT. IT CAME TO A REST RIGHT SIDE UP. NONE OF THE AIRBAGS DEPLOYED DESPITE EXTENSIVE DAMAGE RESULTING IN A TOTAL LOSS OF THE VEHICLE. IN THE SIX MONTHS PRIOR TO THIS THERE WAS INTERMITTENT ELECTRICAL PROBLEMS AFFECTING INTERIOR LIGHTING AND POWER WINDOW FUNCTIONING THAT COULDN'T BE IDENTIFIED.