Dodge 2012 Durango - Owner Manual - Manual (Page 290)

Deploy and tighten the second crossbar to complete the
deployment of the crossbars. Stowing the Crossbars
Starting with one crossbar, completely loosen the thumb
screws at both ends. Slide the crossbar away from the
matching letter to remove it from the deployed position.
Repeat with the other crossbar.
CAUTION!
Be careful when handling the crossbars to prevent
damage to the vehicle.
Deployed Crossbars
288 UNDERSTANDING THE FEATURES OF YOUR VEHICLE