Lexus GS 450h 2008 Owner's Manual page 53

Locking the driver's door from the outside without a key
Move the lock button to the lock position.
STEP 1
Close the door.
STEP 2
The door cannot be locked if the "POWER" switch is in the ACCES-
SORY or ON mode, or the electronic key is left inside the vehicle.
The key may not be detected correctly and the door may be locked.
Rear door child-protector lock
1-3. Opening, closing and locking the doors and trunk
The door cannot be opened from
inside the vehicle when the locks
are set.
These locks can be set to prevent
children from opening the rear
doors. Push down rear door
switches to lock the rear doors.
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