AFTER REVERSING OUT FROM A PARKING SPOT, I USED THE ELECTRONIC SHIFTER TO PUT THE VEHICLE IN PARK (BY NUDGING THE SHIFTER FORWARD WITH FOOT ON THE BRAKE) SO I COULD QUICKLY RETRIEVE SOMETHING FROM THE GROUND; AS SOON AS I EXITED THE VEHICLE, I FELT IT PULL AWAY, APPARENTLY IN DRIVE (WHICH WOULD HAVE REQUIRED ME TO NUDGE THE SHIFTER BACKWARDS), AND IT ROLLED FORWARD AND STRUCK A FENCE POST BEFORE I WAS ABLE TO GET BACK IN AND GET MY FOOT ON THE BRAKE. THIS DAMAGED THE FRONT BUMPER AND TRIM, REQUIRING REPAIR BY A BODY SHOP. THE BRAND NEW VEHICLE WAS PURCHASED ONLY 9 DAYS PRIOR TO THE INCIDENT.