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:
Information about car conditions (at event)
❒ Trip computer information.
❒ Headlight aiming position display (with dipped beam headlights on) (C). ...
Glow plug warming
(Multijet versions - amber)
GLOW PLUG WARMING FAILURE (Multijet versions - amber)
Spark plug pre-heating
Turning the ignition key to MAR, the warning light turns on and it will turn
off when gl ...
Ignition Key Removal
1. Place the shift lever in PARK (if equipped with an automatic transmission).
2. Turn the ignition switch to the ACC/ON/RUN position.
3. Rotate the key to the OFF/LOCK position.
4. Remove the key ...