Turning the ignition key to MAR the warning light on the dial turns on, but it should go off after few seconds.
If the warning light stays on (on certain versions together with the message on the display), you will not have steering assistance and the effort on the steering wheel will be increased, steering is however possible. Contact Fiat Dealership.
See also:
Anti-Lock Brake System (ABS)
This system aids the driver in maintaining vehicle control under adverse braking
conditions. The system controls hydraulic brake pressure to prevent wheel lockup
and help avoid skidding on slipper ...
External light failure
The warning light on the dial comes on (on certain versions together with the
message on the display) when a failure is detected to one of the following lights:
taillights, brake lights (3rd ...
If an interior light burns out
For the type of bulb and power rating, see “When needing to change a bulb”. ...