DRIVERS HEAD REST DEPLOYMENT . SITTING IN VEHICLE AT A STANDSTILL IN PARKING LOT. STEPPED ON BRAKE TO START ENGINE AND DRIVERS HEAD REST DEPLOYED, HITTING DRIVER IN BACK OF HEAD AND FORCING HEAD INTO STEERING WHEEL. NO MAJOR INJURY, OTHER THAN HEADACHE AND BRUISE ON FOREHEAD. THE VEHICLE HAS NEVER BEEN INVOLVED IN REAR ACCIDENT. GATHERED CAR FAX INFORMATION TO PROVE NO DAMAGE. MILEAGE APPROX 39,000. I PURCHASED THE VEHICLE FROM REPUTABLE DEALER (ENTERPRISE CAR SALES - SAN ANTONIO) ON DECEMBER 28, 2016. CURRENT DRIVER HAS NOT BEEN INVOLVED IN REAR-END COLLISIONS, BUMPS OR DAMAGE TO REAR OF VEHICLE. DEALER CLAIMS NOT RESPONSIBLE FOR VEHICLE. ORIGINAL FACTORY WARRANTY EXPIRED AT 36,000 MILES. LOCAL DODGE DEALERSHIP CLAIMED NOT COVERED AND NOT A FACTORY DEFECT. INSURANCE COMPANY CLAIMS NOT A COVERED DAMAGE, SO NOT RESPONSIBLE. THIS SHOULD BE CONSIDERED A SAFETY HAZARD. TRIED TO RESET HEADREST, BUT WILL NOT GO BACK INTO PLACE. CURRENTLY HAVE IT HELD TOGETHER WITH A LEATHER BELT. CONCERNS WHETHER THE PASSENGER HEADREST WILL DEPLOY WITHOUT WARNING. I FEEL THE MANUFACTURER SHOULD REPLACE THE HEADREST AT NO CHARGE TO THE VEHICLE OWNER.