Dodge 2010 Caliber - Manual (Page 33)

To engage or disengage the Child-Protection Door
Lock system
1. Open the rear door.
2. Insert the tip of the ignition key into the lock and
rotate to the LOCK or UNLOCK position.
3. Repeat steps 1 and 2 for the opposite rear door.
Child-Protection Door Lock Location
32 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE