Removing Rear Bumper

Fig 1: Overview Of Rear Bumper

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Loosen heat protection at the sides.
1. 1.1. Unscrew fastening screws -1- at the left and right of the heat protection.
  
  Fig 2: Identifying Heat Protection Screws
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove bumper.
1. 2.1. Unscrew fastening screws -1- on the bumper -2- and remove it complete with heat protection.
  
  Fig 3: Identifying Bumper Screws
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.