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:
ESC Activation/Malfunction Indicator Light AndESC OFF Indicator Light
The ESC Activation/Malfunction Indicator Light in the instrument cluster will
come on when the ignition switch is turned to the MAR (ACC/ON/RUN) position for
four seconds. If the ESC Activation/ ...
General instructions
– When a light is not working, check that it has not fused before changing the
bulb.
– For the location of the fuses, refer to “If a fuse blows” in this chapter.
– Before replacing a bulb that doe ...
Maintaining Your Air Bag System
WARNING!
• Modifications to any part of the air bag system could cause it to fail when
you need it. You could be injured if the air bag system is not there to protect
you. Do not modify the comp ...