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:
Engine starting
The car is fitted with an electronic engine lock device. If the engine fails
to start, see paragraph “Fiat Code system” in section “Dashboard and controls”. ...
Incomplete door locking
(red)
On certain versions the warning light turns on when one or more doors or the
tailgate are not properly shut.
On certain versions the dedicated message is displayed; symbols
indicate resp ...
Display info
❒ Headlight aiming position display (only with dipped beams on) (A)
❒ Clock (B) (always displayed, also with key removed and front doors closed).
❒ Total (C) and partial ( ...