Fiat 2016 500X Owner's Manual page 59

Do NOT grab the door handle when pushing the door
handle LOCK button. This could unlock the door(s).
Push The Door Handle Button To Lock
GETTING TO KNOW YOUR VEHICLE 57
DO NOT Grab The Door Handle When Locking
NOTE: The Passive Entry system will not operate if the
RKE transmitter battery is dead.
The vehicle doors can also be locked by using the lock
button located on the vehicle's interior door panel.
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