If the car doesn't think I am braking fast enough and senses a car car in front of me, it will engage the Collision Avoidance feature and the brakes are slammed and the car stops on a dime. My concern is that I'm already braking, I still have 2 car lengths to go and by do such a fast stop, I risk the car behind me hitting me. This has happened repeatedly and the dealership can't duplicate the experience. I'm told they replaced something on the brakes in line with a recall but the problem still continues.