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:
How to use the gears
Press the clutch fully before shifting the gear stick into one of the positions
shown in the diagram in fig. 2 (the diagram is also on the gear lever knob).
IMPORTANT
Only engage the reverse gear ...
Capacities
(❒) For use with very cold temperatures we recommend using SELENIA PERFORMER
MULTIPOWER SAE 5W-30.
...