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:
At the filling station
Make sure that the left-hand sliding side door is completely closed before
refueling. You could damage the door and the sliding lock system which comes into
play when the fuel flap is open.
Y ...
Parking sensors (where provided)
Parking sensors are located in the rear bumper to detect and inform the driver
(through an intermittent acoustic signal) about the presence of obstacles behind
the vehicle.
ACTIVATION
Sensors wi ...
Instrument panel
Left-hand drive versions
Version for specific market
ACTIVE, DYNAMIC versions
(A) - Speedometer (speed indicator)
(B) - Fuel level gauge with reserve warning light
(C) - Engine coolant temper ...