Toyota PRIUS Manual page 168

1-5. Adjustable components (seats, mirrors, steering wheel)
 Removing the head restraints
 Installing the head restraints
Adjusting the height of the head restraints

 Adjusting the rear center seat head restraint
Always raise the head restraint one level from the stowed position when
using.
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PRIUS PHV_OM_OM47831E_(EE)
Pull the head restraint up while pressing
the lock release button.
Lock
release
button
Align the head restraint with the installa-
tion holes and push it down to the lock
position.
Lock Press and hold the lock release button
release when lowering the head restraint.
button
Make sure that the head restraints are
adjusted so that the center of the head
restraint is closest to the top of your ears.