Preliminary Work

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the battery. → 2X00IN WORK INSTRUCTIONS AFTER DISCONNECTING THE BATTERY
Open the filler flap.
Drain the fuel tank if necessary. → Draining Fuel - section on "Draining"
Remove rear seat. → REMOVING 1/3-SPLIT FOLDING REAR SEAT or REMOVING 2/3-SPLIT FOLDING REAR SEAT - section on "Removing"
Remove the left and right cap -arrows- . To do this, remove the carpeted floor. Then loosen the four fastening nuts and remove the cap.

Fig 1: Locating Caps
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Fig 2: Identifying Left And Right Connection Units
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect all connections on the right connection unit. Pull off electric plug connections.

Fig 3: Identifying Fuel Supply And Connection Points At Right Connection Unit
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect electric plug connection on the left connection unit.

Fig 4: Identifying Connector For Left Connection Unit
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Open the left and right lock using Wrench T10202 and lift up the connection unit. → Special tool on cap

Fig 5: Identifying Special Tool On Cap
Courtesy of PORSCHE CARS NORTH AMERICA, INC.