Lexus RX450h Owners Book page 88

1-4. Adjustable components (seats, mirrors, steering wheel)
Adjusting the height of the head restraints (front seats)
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Adjusting the rear seat head restraints
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Always raise the head restraints to the uppermost lock position during use.
CAUTION
Head restraint precautions
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Observe the following precautions regarding the head restraints. Failure to do so
may result in death or serious injury.
Use the head restraints designed for each respective seat.
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Adjust the head restraints to the correct position at all times.
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After adjusting the head restraints, push down on them and make sure they are
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locked in position.
Do not drive with the head restraints removed.
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88
Make sure that the head restraints are
adjusted so that the center of the head
restraint is closest to the top of your ears.