My wife and I drove into a parking lot in a strip mall located at 1301 IL Route 59 to park the car. I was driving very slow at 5 miles an hour. As I pulled into a parking spot facing IL Route 59 which is a three lane highway, the vehicle malfunctioned causing it to uncontrollably accelerate. I was not able to control the car as it jumped the curb of the parking lot and went through the grass on the side of the roadway towards IL Route 59. To avoid driving onto IL Route 59 I was able to steer the car right and struck an AT&T telephone box which brought the car to a halt. Police arrived on the scene to check the status of the accident. A police complaint has been filed. Police did not issue a citation to me as this was not my fault and there was clearly a defect in the car that caused this accident. Luckily my wife and I were not injured and the car was towed to a body shop for repair. I called Tesla customer support and they said that they would review the car diagnostics to determine the problem. There were no warnings, symptoms or messages to indicate this behavior by the car. It just accelerated in its own. Please see attached documents for more information.