Procedures

Fuel Tank, Draining

Special tools, testers and auxiliary items required







- Wrench T10202







- Fuel siphoning unit VAS 5190

Work procedure
Observe safety precautions.
Observe rules for cleanliness.

CAUTION: Observe procedures for disconnecting battery.

All except Audi RS4:







- Push cover over battery toward right - arrow 1 - and remove it upward - arrow 2 - .







- With ignition switched off, disconnect Battery Ground (GND) strap - arrow -.

Audi RS4:
- Raise luggage compartment floor covering and secure.







- With ignition switched off, disconnect Battery Ground (GND) strap - arrow - .

All:

CAUTION: Secure Ground (GND) wire of fuel extraction unit VAS 5190 to a bare area of the chassis.







- Pull cone piece - 2 - from shaft end - 1 - of fuel extraction unit VAS 5190 .
- Using insulating tape, apply a mark - arrow - on hose at length - a - = 1,865 mm from end of suction hose.
- Remove fuel filler cap from fuel filler tube.







- Screw shaft end - 1 - of fuel extraction unit VAS 5190 on to fuel filler tube of fuel tank.
- Push suction hose as far into fuel tank until mark applied earlier - arrow - is positioned on shaft end.

NOTE:
- If using a siphoning device without shaft end, proceed basically in the same manner.







- In this case, apply a mark - arrow - using insulating tape on hose at length - a - = 1,800 mm from end of suction hose. The suction hose is inserted correctly when the marking applied earlier stands opposite the lip of fuel filler tube.
- If the hose can only be inserted with difficulty, coat it thinly with engine oil. Never use lubricants containing silicon.

- Drain fuel tank through fuel filler tube as much as possible.
- Carefully pull out suction hose.
- Remove rear seat bench.







- Unbolt cover for right locking flange - arrows - .
- Disconnect electrical harness connector - arrow - at right locking flange.

Audi RS4:







- Free up electrical connector - arrow - for Fuel Pump (FP) Control Module J538 and disconnect.

All:







- Disconnect electrical harness connector - arrow - at right locking flange.







- Mark fuel return line - 1 - and fuel supply line - 2 - .

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

- Pull both lines from locking flange, by pressing release buttons.







- Remove locking ring using wrench T10202 .
- Pull locking flange and sealing ring from opening of fuel tank.







- Insert suction hose, a dimension of - x - = 800 mm in length, through right opening of fuel tank into left fuel tank chamber.
- Drain left fuel tank chamber.
- Install right locking flange again, observing notes for connecting battery.