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:
Materials Added To Fuel
All gasoline sold in the United States is required to contain effective detergent
additives. Use of additional detergents or other additives is not needed under normal
conditions and would result ...
Transporting children safely
SERIOUS DANGER: Never place cradle child’s seats not facing the running direction
on the front seat of vehicles with passenger’s airbag, which during inflation could
cause serious injury, even ...
Chassis
...