Fuel Delivery Unit, Removing and Installing

Fuel Delivery Unit, Removing And Installing

Special tools, testers and auxiliary items required







- Wrench 3087







- Fuel pump wrench 3307

Removing

CAUTION:
- To remove the fuel delivery unit, the fuel tank may only be filled to a maximum of 1/4. Drain fuel tank if necessary.
- Observe procedures for disconnecting battery.







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







- With ignition switched off, disconnect Battery Ground (GND) strap - arrow -
- Open fuel filler flap briefly and then close again.







- Remove rear seat bench Body Interior -.
- Unbolt cover for right locking flange - arrows -.







- Disconnect electrical harness connector -1- at right locking flange.
- Disengage electrical harness connector -2- and lay it aside.

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







- Disconnect fuel line -1- from locking flange by pressing release button.
- Disconnect ventilation line -2- by pressing release buttons.

CAUTION: Locking flange may only be opened when fuel tank is maximum 1/4 full. Otherwise, a large amount of fuel will spill out.







- Remove locking ring using wrench 3087.







- Pull locking flange and sealing ring from opening of fuel tank.
- Disconnect electrical connection on the inner side of the locking flange - arrow -.







NOTE: To improve clarity, a cross-sectional view of the fuel tank is shown in the following illustration.

- Guide fuel pump wrench 3307 through fuel tank opening and place it on fuel delivery unit.







- Release fuel delivery unit with fuel pump wrench 3307, thereby turning approx. 15 degrees toward left until stop (bayonet connection).

- Notch -1- aligns with marking -2-.

- Remove fuel delivery unit.

NOTE: Be aware that fuel is still in the fuel delivery unit.

Installing
Installation is in reverse order of removal. Note the following:

NOTE: Replace seal.







- Insert fuel delivery unit into baffle housing in tank so that the notch -1- at fuel delivery unit aligns with marking -2- at baffle housing.

- Fuel delivery unit can be pressed downward significantly and noticeably.







- Guide fuel pump wrench 3307 through fuel tank opening and place it on fuel delivery unit.







- Fasten fuel delivery unit with fuel pump wrench 3307, thereby turning approx. 15 degrees toward right until stop (bayonet connection).

- Notch -1- aligns with marking -3-.







- Connect electrical connection - arrow - on inner side of locking flange.







- Install new locking flange seal dry.
- Bring locking flange to installation position.

- The tab -2- on locking flange must lie between tabs -1- and -3- on fuel tank.

NOTE: Arrow - points in direction of travel.







- Tighten locking ring.
- Connect battery. Observe safety precautions after connecting battery Electrical Equipment -.

Torque specifications Nm

Component Nm
Locking ring for fuel delivery unit 145