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:
Trip computer
General features
The “Trip computer” displays information (with ignition key at MAR, relating
to the operating status of the vehicle.
This function comprises the “General trip” concerning the comp ...
Seat Bel
Inspect the belt system periodically, checking for cuts, frays, and loose parts.
Damaged parts must be replaced immediately. Do not disassemble or modify the system.
Front seat belt assemblies must ...
Fuel filler cap
To open the cap, turn it anticlockwise and then remove it.
During refuelling, secure the cap to the anti-loss device on the flap as shown
in the figure.
On certain versions the cap has a keylock ...