Toyota Land Cruiser Prado 2012 Manual page 104

1-3. Adjustable components (seats, mirrors, steering wheel)
 Folding down second center seatback only (5-door models)
 If you cannot raise the second seatback
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Pull the center seatback lock release
lever behind the seatback and fold it
down.
To return the center seatback to its origi-
nal position, lift it up until it locks.
Release the seat belt lock by:
Pushing on the lower front edge of the
seatback to slacken the seat belt.
Let the seat belt retract a little.