Preliminary Work

Remove cover over the brake components (brake booster, brake master cylinder and hydraulic unit). → REMOVING COVER .
1. Brake fluid reservoir
2. Brake master cylinder
3. Brake booster
4. Hydraulic unit
  
  Fig 1: Identifying Brake Components
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 1.1. Unclip cover at the left and right -arrows- and remove it.
  
  Fig 2: Removing Brake Components Cover
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove alarm siren.
Remove brake master cylinder → Removing Brake Master Cylinder .