The vehicle was parked(placed in park on gear shift) in a friends driveway, facing upward on approx. 15Deg incline with the engine idling. My wife exited the vehicle and walked around the front of the vehicle to the houses front entrance where she spoke briefly with the owner inside the front door. On leaving the house the car was gone from where it was left parked. My wife found that it had rolled up the driveway incline until it hit a couple of pine trees at the top end of the drive and stopped. She opened the door and found the gear shift still in the parked position at which point she entered the car, placed it in reverse and backed out of the tree branches and took photos. The incident was immediately reported to KIA America and the dealer. The vehicle has been at the dealer for 3 weeks now with no resolution, undergoing "testing". They say it is not operating the way it should be, but they have not been able to identify or correct the issue. KIA America has told me the issue has been elevated to KIA factory tech support. Other than scratches there appears to be no major damage. Photos show driveway, trees that stopped the vehicle and debris and scratches.