WE PURCHASED A 2016 TUCSON LIMITED ON BLACK FRIDAY OF 2016. THIS VEHICLE WAS EQUIPPED WITH THE AUTONOMOUS EMERGENCY BRAKING (AEB) SAFETY OPTION, AS IS ADVERTISED AND DEMONSTRATED ON THE HYUNDAI WEBSITE WITH VIDEO. WE EXPERIENCED A MINOR FRONT-END COLLISION AT APPROXIMATELY 8-10 MPH WHILE MERGING INTO TRAFFIC AT A YIELD FROM HIGHWAY EXIT RAMP. BASED ON THE ADVERTISED FUNCTION AND VIDEO, SHOULD HAVE BEEN PREVENTED BY THE AEB. SUBSEQUENT TO THIS COLLISION, WE BEGAN SEEING INTERMITTENT WARNING NOTIFICATIONS TO CLEAN THE FRONT RADAR EVEN THOUGH THERE WAS NO DIRT OR ANY OBSTRUCTION. THESE MESSAGES WOULD SPONTANEOUSLY CLEAR AFTER APPROXIMATELY 30-60 SECONDS. WE TOOK THE VEHICLE TO THE DEALERSHIP TO BE EVALUATED. THE VEHICLE WAS WITH THE DEALERSHIP FOR ALMOST TWO WEEKS AND AFTER EXTENSIVE TESTING - WHICH INCLUDED MULTIPLE ROAD TESTS, MULTIPLE SIMULATED OBSTRUCTION DETECTION, A PEDESTRIAN CHALLENGE BY THE SERVICE MANAGER, LITERATURE REVIEWS, AND AN ONSITE EVALUATION FROM HYUNDAI ENGINEERING ' AND AFTER ALL OF THESE EVALUATIONS, THE SERVICE DEPARTMENT WAS ALSO UNABLE TO TRIGGER THE AEB UNDER ANY CONDITIONS ALTHOUGH THE ELECTRONIC SCAN INDICATES THAT THE RADAR IS OPERATIVE. THEY HAVE RETURNED THE VEHICLE TO US WITH THE STATEMENT THAT IT IS FUNCTIONING AS INTENDED. THE AEB IS NOT DEMONSTRABLY FUNCTIONING, REGARDLESS OF RADAR OPERATION.