Lexus ES300 Owner's Manual page 127

D Remember that the extender provided for you may
not be safe when used on a different vehicle, or for
another person or at a different seating position than
the one originally intended for.
To connect the extender to the seat belt, insert the tab into
the seat belt buckle so that the "PRESS" signs on the
buckle release buttons of the extender and the seat belt
are both facing outward as shown.
You will hear a click when the tab locks into the buckle.
When releasing the seat belt, press on the buckle release
button on the extender, not on the seat belt. This helps prevent
damage to the vehicle interior and extender itself.
When not in use, remove the extender and store in the vehicle
for future use.
COMFORT ADJUSTMENT
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.
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