Ram Trucks 2012 С/V - Owner Manual - Manual (Page 35)

If the lock knob is down when you shut either front door,
the door will lock. Make sure the keys are not inside the
vehicle before closing the door. If the lock knob is rearward when you shut either side
sliding door, the door will lock. Make sure the keys are
not inside the vehicle before closing the door.
Manual Door Lock Sliding Door Lock
2
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 33