SLIDING DOORS HAVE NO LOCKING SYSTEM IN PLACE TO KEEP DOORS OPEN WHEN ON AN INCLINE. AS I WAS LOADING VAN I TURNED TO PICK UP ITEMS AND 2YR. OLD SON STARTED TO CLIMB IN THE PASS. SIDE SLIDING DOOR. AS HE CLIMBED IN, DOOR RELEASED AND CLOSED ON HIS HEAD CAUSING BUMP ON BACK OF HEAD AND CUTS AND MODERATE SWELLING ON FACE.