See also:

Compass display (if so equipped)
This unit measures terrestrial magnetism and indicates the direction of the vehicle’s heading. With the ignition switch placed in the ON position, press the button as described in the chart b ...

Audio operation precautions
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Air pollution
Industrial pollution, the presence of salt in the air in coastal areas, or heavy road salt use accelerates the corrosion process. Road salt also accelerates the disintegration of paint surfaces. ...