Lexus RX300 Manual page 102

The retractor will lock the belt during a sudden stop or on impact.
It also may lock if you lean forward too quickly. A slow, easy motion
will allow the belt to extend, and you can move around freely.
When a passenger's shoulder belt is completely extended and is then
retracted even slightly, the belt is locked in that position and cannot
be extended. This feature is used to hold the child restraint system
securely. (For details, see "Child restraint" on page 104.) To free the
belt again, fully retract the belt and then pull the belt out once more.
If the seat belt cannot be pulled out of the retractor, firmly pull the
belt and release it. You will then be able to smoothly pull the belt out
of the retractor.
CAUTION
D After inserting the tab, make sure the tab and buckle are
locked and that the belt is not twisted.
D Do not insert coins, clips, etc. in the buckle as this may
prevent you from properly latching the tab and buckle.
D If the seat belt does not function normally, immediately
contact your Lexus dealer. Do not use the seat until the seat
belt is fixed. It cannot protect an adult occupant or your
child from injury.
COMFORT ADJUSTMENT
16R015a
Adjust the position of the lap and shoulder belts.
1 Position the lap belt as low as possible on your hips – not on
your waist.
2 Adjust it to a snug fit by pulling the shoulder portion upward
through the latch plate.
CAUTION
D High–positioned lap belts and loose–fitting belts both could
cause severe injuries due to sliding under the lap belt
during a collision or other unintended result. Keep the lap
belt positioned as low on hip as possible.
D For your safety, do not place the shoulder belt under your
arm.
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