Deflector Assembly

Open the lid assembly - sunroof and the sunshade assembly.
Remove the deflector assembly - sunroof.
1. Remove the spring from the rail assembly - sunroof.
  
  Fig 1: Removing Spring From Rail Assembly - Sunroof
  Courtesy of SUBARU OF AMERICA, INC.
2. While pressing down the hook (a) of rail assembly - sunroof, slide it to the rail rear direction to remove.
  
  Fig 2: Pressing Down Hook Of Rail Assembly - Sunroof
  Courtesy of SUBARU OF AMERICA, INC.
3. Remove the deflector assembly - sunroof from the hook of rail assembly - sunroof.
  
  Fig 3: Removing Deflector Assembly - Sunroof From Hook Of Rail Assembly - Sunroof
  Courtesy of SUBARU OF AMERICA, INC.