I was driving down the street and a car slowed down way in front of me. While I was braking my automatic braking system turned on and brought me to a complete stop. This caused my car to get hit from the back. The automatic braking does not slow down the car, it brings the car to a complete stop. Another incident, I was driving on the highway with nothing was in front of me and the brake signal started flashing and slowing the car down.