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:
Fix & go (quick tyre repair kit)
On request the car can be fitted with a quick tyre repair kit, called “Fix &
Go”, replacing the common tool kit and the spare wheel.
The Fix & Go kit is located in the boot under the moquet ...
10. Cruise Indicator — If Equip
This indicator shows that the Speed Control system is on. ...
Boot light
To change the bulb, proceed as follows:
❒ remove the lens (A) as shown by the arrow;
❒ lift protection (B) and remove the bulb (clipped in).
...