Mercedes Class-Series E-Class

Vehicle was at a car wash the vehicle behind it was a large Dodge Ram Pick up diesel. As the Ram was traveling through the car wash tunnel, it roll started itself. At the end the tunnel, it rolled into the rear of the Bens and pushed it across the parking lot, over the curb, and down the embankment. It came to a rest against a tree and the Ram came to rest ?in the trunk? of the Bens. Bens was very new less than 5,000 miles.