Toyota Lexusc Owner's Handbook Manual page 508

In the following cases, vehicle height is changed to "N"
(normal) mode height automatically.
D Vehicle speed exceeds approximately 12 km/h (8 mph).
D The engine is restarted and the easy access mode is
canceled.
NOTICE
Be careful when you drive in any place where overhead
space is limited and you have selected the easy access
mode. When the vehicle begins to move after stopping,
"N" (normal) mode will automatically be selected,
raising the vehicle's height, and potentially causing
damage to the vehicle.
STARTING AND DRIVING
CAUTION
D When the engine is stopped in easy access mode,
vehicle height is changed quickly. Be careful not to
get your head, hands or other parts of your body
caught by the lowering underbody of the vehicle.
D You must also make sure nobody places his or her
head, hands or other parts of their body between the
body of the vehicle and tires.
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