Dodge 2005 Durango - Manual (Page 108)

WARNING!
The 20% seatback contains the center shoulder belt.
A 20% seatback that is not fully latched in the
upright position will not protect you properly.
To Tumble the 40% seat, fully raise the lever on the side
of the seat to release the floor latches and tumble the seat.
NOTE: The seatback must be fully folded into the down
position to allow the lever to be raised enough to release
the floor latches.
108 UNDERSTANDING THE FEATURES OF YOUR VEHICLE