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:
Deactivation
Turn the ignition key to STOP.
At the following starting operation (key at MAR), the sensor will not be reactivated
even is the stalk is on (B). In this event, to activate the rain sensor, you have ...
To Activate
Push the ON/OFF button. The Cruise Indicator light in the instrument cluster
will illuminate. To turn the system off, push the ON/OFF button a second time. The
Cruise Indicator light will turn off ...
Dashboard
The presence and the position of the instruments and warning lights may vary
according to the versions.
1. Fixed side vent
2. Adjustable side vent
3. Horn
4. Instrument panel
5. Adjustable ce ...