Fiat 500 2016 remote key added with Autel MaxiIM IM508 + xp400pro via OBD.
xp200 will works also (x400pro is not necessary, I used XP400 Pro because I bought IM508 + XP400 Pro at cheaper price).
It’s aftermarket key I bought additionally instead of OEM key.
Fiat 500 2016 remote key coverage by Autel MaxiIM IM508:
Take Fiat (AF area) 500 2008 -2017 for example: