WARNING: This page is about a different car, the 2016 Porsche Macan and 2015 Porsche Macan. However, it is still accessible from the selected car via links, so may be relevant.
Open the cover on the armrest and remove handset.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lever out stopper -1-
.
Unscrew fastening screws -2-
.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Lift up telephone console and disconnect electric plug connection.