Dodge 2008 Nitro - Manual (Page 32)

Child-Protection Door Lock System (Rear Doors)
Insert the tip of the ignition key into the lock and rotate
to the lock or unlock position.
WARNING!
Avoid trapping anyone in a vehicle in a collision.
Remember that the rear doors can only be opened
from the outside when the child protection locks are
engaged.
NOTE: For emergency exit with the system engaged,
move the lock plunger up (unlocked position), roll down
window and open the door with the outside door handle.
Inserting Ignition Key
32 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE