2010 FREIGHTLINER. CONSUMER WRITES IN REGARDS TO DD13 ENGINES AND ROLL OVER PROTECTION SYSTEM. *SMD THE CONSUMER STATED AS HE WAS ACCELERATING TO MERGE INTO TRAFFIC, THE TRUCK SHUT DOWN AND HE APPLIED THE BRAKE. SINCE THE TRUCK WAS NOT STRAIGHT, AS HE HAD JUST COME OUT OF A CURVE, THE TRAILER WENT STRAIGHT AHEAD AND ROLLED THE TRUCK OVER.