My two year-old grandson opened the rear door the other day while my wife was driving. I didn't have the childproof locks engaged because I didn't think that he could reach the handle yet and thought that when the doors were locked that they couldn't be opened from the inside anyway. I was wrong on both accounts. After consulting the owner's manual, I found, to my surprise that pulling the handle twice will open the door. The first pull unlocks the door and the second pull will open the door. To wit:
Rear Door Unlocking and OpeningPull the interior door release handle twice to unlock and open the rear door. The first pull unlocks the door and the second pull will unlatch the door.
Whoa! Obviously, he can't fall out since he's securely strapped into the child seat. Fortunately, there were no other cars nearby when the door opened.
Needless to say, the childproof lock is now engaged.