Dodge 2007 Caliber - Manual (Page 14)

Automatic Transaxle Ignition Interlock System
This system prevents the key from being removed unless
the shift lever is in PARK. It also prevents shifting out of
PARK unless the key is in the ACC, or ON positions, and
the brake pedal is depressed.
DOOR LOCKS
Manual Door Locks
Use the manual door lock plunger to lock the doors from
inside the vehicle. If the plunger is down when the door
is closed, the door will lock. Therefore, make sure the
keys are not inside the vehicle before closing the door.
WARNING!
For personal security, and safety in the event of an
accident, lock the vehicle doors as you drive as well
as when you park and leave the vehicle.
Manual Door Lock Plunger
14 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE