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:

    Listing the registered cellular phones
    Select “List Phones” using a voice command or the “TUNE/SEL” knob. The list of registered cellular phones will be read aloud. When listing is complete, the system returns to “Phone Setup ...

    Audio system
    Vehicles with a navigation system Refer to the “Navigation System Owner’s Manual”. Vehicles without a navigation system CD player with a changer and AM/FM radio  - Using cellular phon ...

    If your vehicle fails an emissions test
    If your vehicle fails an EPA-approved emissions test, you may make a claim under the Emission Performance Warranty. To do so, take your vehicle to an authorized Lexus dealership and present a cop ...