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:
Code card (where required)
The car is delivered with two copies of the key and the CODE card which bears
the following:
❒ the electronic code (A) to be used for emergency starting (see “Emergency starting”
in sectio ...
Display Information
ID3–Tag Information Display
In addition to the information relating to the time elapsed, folder name and
file name, the radio is also capable of displaying ID3–TAG information relating
to Title T ...
Diesel fuel filter sensor failure
The warning light on the dial comes on (on certain versions together with the
message on the display) when dieel fuel filter sensor failure is detected. Contact
Fiat Dealership as soon as poss ...