Additional locks are designed to prevent accidental opening of the rear door child riding in the back seat. If you are transporting a child in a car, always include additional deadlocks on both rear doors.
To lock the rear door lock from the opening of the interior of the car, open the door, insert the key into the slot and turn it to lock. After closing the door can not be opened from inside the car. It can only be opened from outside the vehicle by pulling on the door handle towards you
(Fig. 1.25).