Wagon Model

Disconnect the ground cable from battery.
Remove the clips.

Fig 1: Removing Clips
Courtesy of SUBARU OF AMERICA, INC.
While pressing the portion (A), insert your finger or flat-tip screwdriver wrapped with tape into the clearance (B) to remove pawls in the order of (C), (D), (E), and remove the rear combination cover.

Fig 2: Removing Rear Combination Cover
Courtesy of SUBARU OF AMERICA, INC.
Remove the two bolts, and then detach the rear combination light by pulling it to the rear side of vehicle.

Fig 3: Removing Two Bolts
Courtesy of SUBARU OF AMERICA, INC.
Remove the rear combination light after turning the socket of tail/stop light bulb and rear turn signal light bulb to remove the bulbs.