Chrysler 2016 300 Owner's Manual page 16

14 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE
To remove the emergency key, slide the mechanical latch
on the back of the RKE Key Fob sideways with your
thumb and then pull the key out with your other hand.
Emergency Key Release Latch
Emergency Key Removal
NOTE: You can insert the double-sided emergency key
into the lock cylinders with either side up.