Fiat Abarth 500 2015 Owner's Manual page 332

330 WHAT TO DO IN EMERGENCIES
3. Remove the shift lever override access cover (located
on the right side of the shift lever housing) by prying
at the bottom edge of the cover.
Shift Lever Override Access Hole
4. Press and maintain firm pressure on the brake pedal.
5. Insert a small screwdriver or similar tool into the
access hole, and push and hold the override release
lever in.
6. Move the shift lever to the NEUTRAL position.
7. The vehicle may then be started in NEUTRAL.
8. Reinstall the shift lever override access cover.