Lexus GS430 User Manual page 170

OCCUPANT RESTRAINT SYSTEMS
Adjusting seatback angle
g16003
Move the control switch in the desired direction.
Releasing the switch will stop the seatback in that position.
CAUTION
Avoid reclining the seatback any more than needed.
The seat belts provide maximum protection in a frontal
or rear collision when the driver and the front passenger
are sitting up straight and well back in the seats. If you
are reclined, the lap belt may slide past your hips and
apply restraint forces directly to the abdomen or your
neck may contact the shoulder belt. In the event of a
frontal collision, the more the seat is reclined, the
greater the risk of death or personal injury .
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Adjusting seat cushion angle and height
G16004
Move the control switch in the desired direction.
Releasing the switch will stop the seat cushion in that position.