Lexus GX460 Manual page 227

Automatic headlight leveling system (if equipped)
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The level of the headlights is automatically adjusted according to the number of
passengers and the loading condition of the vehicle to ensure that the headlights do
not interfere with other road users.
If the "AFS OFF" indicator flashes (if equipped)
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It may indicate a malfunction in the system. Contact your Lexus dealer.
Customization
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Settings (e.g. light sensor sensitivity) can be changed. 
(Customizable features: P. 787)
NOTICE
To prevent battery discharge
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Do not leave the lights on longer than necessary when the engine is not running.
GX460_U.S.A. (OM60G24U)
2-3. Operating the lights and windshield wipers
2
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