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:

    Determining Your Maintenance Interval: Months vs. Mileage
    Lexus recommends obtaining scheduled maintenance for your vehicle every six months or 5,000 miles, whichever occurs first. For example: • If at six months you have driven less than 5,000 miles, ...

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    Federal Emission Control Warranty
    WHAT IS COVERED AND HOW LONG Emission Defect Warranty Lexus warrants that your vehicle: • Was designed, built and equipped to conform at the time of sale with applicable federal emissions stand ...