Toyota Lexusc Owner's Handbook Manual page 511

STARTING AND DRIVING
D Selecting the "N" mode
To change "HI" to "N" mode: Push the height select switch
on the "B" (lower) side once.
To change "LO" to "N" mode: Push the height select switch
on the "Y" (higher) side once.
The "N" indicator light blinks as the vehicle's height changes.
When the vehicle's height reaches the "N" mode, the indicator
light remains on.
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Even if the engine stops while the vehicle's height is being
lowered, the operation continues for up to one minute.
D Selecting the "LO" mode
To change "N" mode to "LO": Push the height select switch
on the "B" (lower) side once.
To change "HI" mode to "LO": Push the height select switch
on the "B" (lower) side twice.
The "LO" indicator light blinks as the vehicle's height changes.
When the vehicle's height reaches the "LO" mode, the indicator
light remains on.
Even if the engine stops while the vehicle's height is being
lowered, the operation continues for up to one minute.