I was leaving a shopping center on germantown pike and joshua road in lafayette hill, pa and was driving on the shopping driveway to get toward joshua road. The driveway declines to a stop sign, where you make a right to go on to joshua, or a left to go through the back of the shopping center. A Honda CRV was stopped, waiting to make a right on to joshua, and I stopped behind her. I was fully stopped my car moved slightly forward, and I pressed the brake harder. Then the car moved again, a little more, and I pressed the brake harder, and the car definitely did not fully stop and gently coasted down the decline toward the CRV then the car accelerated with a very loud noise, a noise that was louder than a normal acceleration, and my car rear ended the CRV. My foot remained on the brake during the acceleration. To be clear, this wasn't a braking issue, this was a self-acceleration issue. It felt like the self parking capability, or some other form of software, had "taken over" and overrode the brake. The feeling was that the car "surged" as the self acceleration happened while braking, versus a smooth feeling. At the time I had the car for 180 miles.

- Lafayette Hill, PA, USA