See also:

Fuel Formulations
Do not use gasoline that contains lead as a knock inhibitor, and do not use lead additives. Besides damaging the exhaust emission control systems on your vehicle, lead has been strongly linked ...

Recirculation/air quality system
Recirculation This function can be used to shut out exhaust fumes, smoke, etc., from the passenger compartment. The air in the passenger compartment is then recirculated, i.e., no air f ...

On/Off button
To activate the system: 1. Turn the ignition key to position I. NOTE If you switch off the ignition while the audio system is on, the system will be on when the ignition is switched on again. ...