Dodge Durango Owner's Manual page 133

NOTE: The seatback must be fully folded into the down
position to allow the lever to be raised enough to release
the floor latches.
Tumble Lever
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 131
To fold and tumble the second row 40% seats from the
third row, fully raise the lever at the rear of the seat to
fold the seatback. Continue raising the lever to release the
floor latches to tumble the seat.
NOTE: The head restraints must be lowered but do not
have to be removed to fold and tumble the seats.
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