The driver took it into several cars and flipped it on its side.
She had not even left the dealership’s car park.
Police in Virginia were called to the Balston forecourt, and found amazingly, no one was hurt.
Local news site arlnow reports the incident happened at the Mercedes dealership on North Glebe Road.
They said: “We’re told that the driver was just beginning a test drive, in the dealership parking lot, and might have mistaken the gas pedal for the brake.