Lexus SC 430 2004 Manual page 160

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2. To remove the child restraint system, press the buckle
release button and allow the belt to retract.
OCCUPANT RESTRAINT SYSTEMS
Using a top strap
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Follow the procedure below for a child restraint system
that requires the use of a top strap.
When installing a top strap, the retractable hardtop should be
open. How to open the retractable hardtop can be found in
"Retractable hardtop" on page 82.
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