Fiat 2016 500 Owner's Manual page 102

100 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
NOTE: To remove the head restraint, raise it as far as it
can go then push the release button and the adjustment
button at the base of each post while pulling the head
restraint up. To reinstall the head restraint, put the head
restraint posts into the holes and push downward. Then
adjust the head restraint to the appropriate height.
Head Restraint
1 — Release Button
2 — Adjustment Button