Turning the Automatic Sound Levelizer (ASL) on/off

Turning the “TUNE/SEL” knob clockwise turns on the ASL, and turning the “TUNE/SEL” knob counterclockwise turns off the ASL.

ASL automatically adjusts the volume and tone quality according to the noise level as you drive your vehicle.

    See also:

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    What is not covered
    These warranty obligations do not apply to failures or noncompliance caused by: • The use of replacement parts not certified in accordance with aftermarket parts certification regulations. ...