See also:

Recirculation Control
When outside air contains smoke, odors, or high humidity, or if rapid cooling is desired, you may wish to recirculate interior air by pressing the RECIRCULATION control button. Recirculation mo ...

Low battery charge
Turning the key to MAR the warning light on the dial turns on, but it should go out as soon as the engine is started (with the engine running at idle speed a brief delay in going out is allowed) ...

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 ...