2/5/19, attempted to use parallel park assist for the first time. Following prompts on the display, pulled forward and stopped. Next screen prompted to remove hands from steering wheel, vehicle proceeded to back up slowly and turned into designated space, car accelerated with no time to apply brakes and impacted car parked behind me and stalled. Vehicle speed pushed the parked vehicle 30 ft. That vehicle stopped when it hit a parked car,2 spaces behind it. I called the dealer that day to add the incident to a scheduled servicing on 2/8/19. Serv dept ran diagnostics, no malfunction to the system. A test drive showed parking assist did not sense the curb during parallel parking, but registered for perpendicular parking. Results were unacceptable, it came too close to the vehicle next to it, no prompt to stop and pull forward. He backed into the curb, no prompt from assist feature. Findings were forwarded to Ford motor. 2/17/19, while at a red light, no other vehicles, the light changed to green, and when brakes released, collision avoidance sounded and sensors lit up. Vehicle was not moving. I received a letter that Ford does not believe the subject vehicle qualifies for compensation because the dealership test drove the vehicle and could not be duplicate complaint. 5/29/19, the serv mng explained that another service department verified all sensors and wiring are operational. A technician test-drove it and assured me that everything worked properly. I drove my vehicle to a parking lot, and tried to use park assist. It indicated an empty spot, and proceeded to auto-park. The sensors did not indicate a car already parked there. It gave no warning to stop, I manually terminated the assist. The service dept asked for the vehicle, so a field service engineer could test the system. They concluded the system does not work as it should and no update is available at this time.

- Solomons, MD, USA