A: Removal

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Peel the end of the roof molding, and slide the inner clip in the direction of the arrow using a flat tip screwdriver, to remove the clip from the stud on the vehicle side.
CAUTION: Be careful not to damage the body.

Right side: Slide towards the front of the vehicle.

Left side: Slide towards the rear of the vehicle.

Fig 1: Sliding Inner Clip Towards Front Of Vehicle
Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Removing Clip From Stud On Vehicle Side
Courtesy of SUBARU OF AMERICA, INC.
Pull up the roof molding upward, and remove from the vehicle.
Remove the roof trim. < Refer to REMOVAL , Roof Trim. >
Remove the nuts, and remove the roof carrier bracket.

Fig 3: Locating Roof Carrier Bracket Nuts
Courtesy of SUBARU OF AMERICA, INC.