Procedures

Fuel Tank, Emptying

Special tools, testers and auxiliary items required

• Fuel siphoning unit (VAS 5190)

• Wrench (T10202)

CAUTION!
Fuel supply lines are under pressure! Wear protective goggles and protective gloves to avoid damage and contact with skin. Before removing from hose connection wrap a cloth around the connection. Then release pressure by carefully pulling hose off connection.

Work procedure

- Read safety precautions before beginning work --> [ Safety Precautions ] Safety Precautions.

- Open fuel tank flap.

- Push suction hose - arrow - of fuel siphoning unit (VAS 5190) about 170 to 180 cm into fuel filler neck and extract fuel.





• When no more fuel can be extracted, the tank is emptied enough for the flange to be opened without danger. The tank may be removed while containing the remaining fuel. If work must be performed on the fuel pumps or fuel tank sensors, proceed as follows:

- Cut open carpet from point - A - to point - B - in pre-cut area - arrows -.





- Remove nuts - 1 - from cover. If necessary, remove backrest support - 2 - or support mounting: --> Body Interior 72 Removal and Installation





- Hold a cloth on connections for fuel supply line and auxiliary heater and pull off hose couplings.

• Release connection by pressing button on hose coupling.

- Disconnect harness connector for Fuel Pump (FP) and fuel tank sensor.

- Remove locking ring from flange using wrench (T10202).





- Carefully pry flange and lift it upward slightly.

- Insert suction hose of fuel siphoning unit (VAS 5190) as deeply as possible in right and then left sides of fuel tank and extract fuel.

- For work on left side of fuel tank, proceed as described above.

- When breather line is pulled off, hose coupling button often cannot be pressed in. In that case, use assembly tool (T10118) - arrow -.





For additional work on components inside of fuel tank, flanges may remain removed.

If fuel tank only needed to be emptied, install flange again.

- First check that sensor flange seals are properly seated

• If seals are swollen with fuel, always replace.

- Insert flange with locating tab facing in direction of travel - arrow -.





- Tighten right and left locking rings to specified torque using wrench (T10202).