2014 FREIGHTLINER XC-R Engine Problems

FOR THREE YEARS SINCE THE FIRST DAY I GOT IT THE ENGINE WILL COMPLETELY SHUT OFF. NO POWER STEERING NO GAUGES NO THROTTLE CONTROL ALL WHILE GOING DOWN THE ROAD AT 55 - 65 MPH. BY THE TIME I DEAD STICK IT TO THE SIDE OF THE ROAD THE ENGINE AUTOMATICALLY STARTS AND ALL APPEARS OK. I FEAR FOR MY LIFE AND MY FAMILY IF I AM ON A MOUNTAIN ROAD AND IN A TURN WHEN THIS MIGHT HAPPEN. IT MAY GO WEEKS BEFORE IT DOES IT AGAIN OR A DAY BUT IT USUALLY IS 1 TO XX HOURS ON THE ROAD TRAVELING ON HIGHWAY OR FREEWAYS. I HAVE HAD FREIGHTLINER SERVICE CENTER AT THE FACTORY LOOK AT IT SEVERAL TIMES AND ALSO CUMINS PLACES. LATELY I HAVE HAD SEVERAL RV REPAIR PLACES TOO BUT PROBLEM DOES NOT HAPPEN SITTING IN THE SHOP IDLING OR A SHORT DRIVE AROUND THE...