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:
Failure warning lights
Any failure is indicated by cluster warning light
coming on together with the message
on the reconfigurable multifunction display (where required) (see section “Warning
lights and messages”). In ...
At the filling station
Make sure that the left-hand sliding side door is completely closed before
refueling. You could damage the door and the sliding lock system which comes into
play when the fuel flap is open.
Y ...
Knee Impact Bolster
The Knee Impact Bolster helps protect the knees of the passenger side front passenger
by positioning the passenger for the best interaction with the Advanced Front Air
Bags.
Along with seat belts ...