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 in additional cost. Therefore you should not have to add anything to the fuel.
See also:
11. Seat Belt Reminder Light
When the ignition switch is first turned to ON/ RUN, this light will turn on
if the driver’s seat belt is unbuckled, a chime will sound. When driving, if the
driver’s seat belt remains unbuckled ...
Main beam headlights
To change the halogen bulb, proceed as follows:
1) Remove the protection cover Cfig.
18 turning it counterclockwise;
2) Release clip A-fig. 19, remove connector B and remove the bulb C.
...
Glow plug warming failure
The warning light on the dial flashing (on certain versions together with the
message on the display) when there is a failure in the glow plug warming system.
Contact Fiat Dealership as soon a ...