Turning the key to MAR the warning light on the dial turns on, but it should go off as soon as the engine is started.
If the 
warning light turns on when
the car is travelling (on certain versions together with the message on the display),
stop the engine immediately and contact a Fiat Dealership.
See also:
Heated Seats — If Equipped
On some models, the front driver and passenger seats may be equipped with heaters
in both the seat cushions and seatbacks. The controls for the front heated seats
are located on the center instrum ...
Dipped beams
To change the halogen bulb, proceed as follows:
1) Remove the protection cover Bfig.
18 turning it counterclockwise;
2) Release clip A-fig. 20, remove connector B and remove the bulb C.
...
Installation of electric / electronic devices
Electric/electronic devices installed after buying the car or in aftermarket
shall bear the and marking:
Fiat Auto S.p.A. authorizes the installation of transceivers provided that installation
...