I was on a sharp incline at idle behind a line of cars, waiting for the light to turn green and my Subaru Forrester surged forward, out of my control, and hit the back of the vehicle in front of me, causing damage to my vehicle and the one in front of me. I questioned the Subaru service center regarding it and they did not have a means to report the incident to Subaru for investigation, but offered to do a service check on the transmission of the car. Coincidentally (or of uncertain significance), I had been waiting on a back ordered part from Subaru for a malfunctioning thermal control valve that caused a check engine light to be continually displayed on my dash, disabling some of the safety features of the vehicle. They assured me that the malfunctioning part would have nothing to do with any surging problems and that it was safe to drive the car until the part could be replaced.