Preliminary Work

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Toxic substances

Danger of poisoning or suffocation
Danger of burns to the eyes and skin

→ Ventilate the work area well.

→ Never ingest or inhale.

→ Read specific information on the Hazard Sheet.

→ Wear personal protective gear.

→ Do not smoke, eat or drink in the work area.

WARNING: Highly inflammable or explosive materials

Danger of fire or explosion

→ Avoid contact with hot parts or sources of ignition.

→ Use suction to remove ignitable vapours.

→ Attach warning sign in a clearly visible position.

Information

Absorb any escaping fuel using a suitable binding material or a cloth.
Cloths which have absorbed fuel must be disposed of according to the applicable national laws.
The fuel system must be depressurised before starting work on it.
Only work on the fuel system in well-ventilated rooms.
Any seals which have been removed must always be replaced.
Do not use any sealant containing silicone or silicone spray when the injection system is open. Traces of silicone drawn in by the engine are not combusted and damage the oxygen sensors.

Relieve the fuel pressure =>
1. 1.1. Switch off ignition.
2. 1.2. Pull out fuse 13 and 14.
3. 1.3. Start the engine and wait until the engine cuts out on its own accord.
Loosen rear seat and fold it up. Secure to the headrest using a piece of wire if necessary. → Removing Rear Seat
Loosen reinforcement plate for right seat-belt buckle. To do this, loosen the three fastening screws and twist the plate with the seat-belt buckle to the side. Do not use the fastening screws again.
Loosen the right cap (figure shows both) -arrows- . To do this, remove the carpeted floor. Then unscrew the four fastening nuts and remove the cap.

Fig 1: Locating Fastening Nuts For Cap
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Carefully detach the fuel supply line -1- at the right connection unit (place several cloths underneath to absorb the fuel that squirts out).

Fig 2: Locating Fuel Supply And Disconnection Points At Right Connection Unit
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
After opening the fuel line, connect the measuring tool immediately and re-insert the fuses for the fuel pumps.