MY 2013 FIAT ABARTH WAS REAR ENDED. I WAS STOPPED. THE OTHER DRIVER, IN A GRAND CHEROKEE, REAR ENDED ME. HIS SPEED WAS APPROXIMATELY 20-30 MPH. I WAS KNOCKED UNCONSCIOUS BRIEFLY & HAD SEVERE HEAD PAIN. I AM STILL UNDERGOING TREATMENT. NONE OF MY CARS SAFETY FEATURES WORKED, INCLUDING THE FUEL PUMP SHUT OFF. I BELIEVE THE SEAT HIT ME IN THE HEAD. THE ABARTH HAS UNIQUE, HIGH BACKED SEATS WITH A FIXED / INTEGRATED HEAD REST WITH A HARD, PLASTIC INSERT. MY SEATBELTS FAILED TO TIGHTEN AND THE FUEL PUMP FAILED TO SHUT OFF. I WORKED FOR CHRYSLER FIAT AT THE TIME AND DID TELL PEOPLE IN ENGINEERING ABOUT THE CONCERN. I SUFFERED A CONCUSSION & NOW HAVE CONSTANT, DAILY HEADACHES AND MIGRAINES.