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:
Center High Mounted Stop Lamp (CHMSL)
1. Remove the two guard caps and the two fastening screws.
2. Remove the center high mounted stop lamp assembly.
3. Disconnect the electric connector.
4. Press the retaining device and open the bul ...
Engine Air Cleaner Filter
Refer to the “Maintenance Schedule” for the proper maintenance intervals.
WARNING!
The air induction system (air cleaner, hoses, etc) can provide a measure of
protection in the case of engine bac ...
Engine
...