Safety precautions when working on fuel supply system

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2008 Audi S4, 2008 Audi RS 4, 2008 Audi A4, 2007 Audi S4, and 2007 Audi RS 4. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: The fuel system is under pressure! Before opening system, place rags around the connection area. Then release pressure by carefully loosening the connection.

The following steps should be taken before beginning work on the fuel supply system:

CAUTION: Place lighters, as well as lighters of others in the area, out of reach. The lighter can ignite fuel vapors.

CAUTION:

Observe procedures for disconnecting battery →
- 27 BATTERY, STARTER, GENERATOR, CRUISE CONTROL
- 27 BATTERY, STARTER, GENERATOR, CRUISE CONTROL for ELECTRICAL EQUIPMENT, CABRIOLET
.

Disconnect battery Ground (GND) strap with ignition switched off.
Open fuel filler cap briefly and then close again.

When removing and installing components from a full or partially full fuel tanks, note the following:

The fuel tank may only be partially full. How much fuel can remain in the fuel tank may be read in the respective work description. Drain fuel tank if necessary. Procedure: Vehicles with front wheel drive up to 06.03 → Fuel tank, draining , Vehicles with front wheel drive from 07.03 to 10.04 → Fuel tank, draining , Vehicles with front wheel drive as of 11.04 → Fuel tank, draining , Vehicles with all wheel drive up to 06.03 → Fuel tank, draining , Vehicles with all wheel drive from 07.03 to 10.04 → Fuel tank, draining , Vehicles with all wheel drive as of 11.04 → Fuel tank, draining .
Before starting work, switch on exhaust extraction system and place an extraction hose close to the installation opening of fuel tank to extract escaping fuel fumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in air flow) with a displacement greater than 15 m ³ /h can be used.
Prevent fuel from contacting skin! Wear fuel-resistant gloves!

Note the following when removing and installing fuel tank:

Fuel tank must be empty for weight reasons. Drain fuel tank if necessary. Procedure: Vehicles with front wheel drive up to 06.03 → Fuel tank, draining , Vehicles with front wheel drive from 07.03 to 10.04 → Fuel tank, draining , Vehicles with front wheel drive as of 11.04 → Fuel tank, draining , Vehicles with all wheel drive up to 06.03 → Fuel tank, draining , Vehicles with all wheel drive from 07.03 to 10.04 → Fuel tank, draining , Vehicles with all wheel drive as of 11.04 → Fuel tank, draining .