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:
Emergency start-up
If the instrument panel warning light
stays on with fixed light, the emergency
start-up can be performed by using the CODE card code (see section “In an emergency”). ...
ABS system
The car is fitted with an ABS braking system, which prevents the wheels from
locking when braking, makes the most of road grip and gives the best control when
emergency braking under difficult roa ...
Rear fog lights
(amber)
The warning light turns on when the rear fog lights are turned on. ...