Lexus LS460 2008 Owner's Manual page 281

Roof side outlets
Button lock function
■
5-seat models
4-seat models
3-2. Using the air conditioning system and defogger
Direct air flow to the left or right,
up or down.
To prevent inadvertent operation, the buttons
on the rear armrest can be locked. Press
until you hear a beep to lock the buttons.
Pressing again until you hear a beep will
release the lock.
The indicator appears on the display when
the buttons are locked.
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