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Fuel escapes when fuel lines are detached. Have a suitable collecting vessel ready.
Catch and dispose of escaping fuel.
Observe country-specific waste disposal regulations.


Ensure adequate ventilation in the workbay!
Avoid skin contact (wear gloves)!

Ensure absolute cleanliness when working on the open fuel tank. Contaminants in the fuel tank can impair driving operation or may even result in vehicle breakdown!

Before starting the engine for the first time:

Top up fuel tank with at least 5 l fuel

Check transfer function of suction jet pump.

Necessary preliminary work:

Draw off fuel from fuel tank
Remove seat bench on vehicles with a 3rd row of seats
Remove right sensor unit

For E70 without 3rd row of seats only:

Only unclip seat bench (1) as shown on the left and right and fold up in direction of arrow.

Secure seat bench on front seat (2).

Disconnect plug connection (1).

Remove cover (2).

Release nuts (1) and remove cover for sensor opening (2) from left side of fuel tank.

Disconnect plug connection (1).

Unlock quick-release fastener (2) and detach fuel feed line.

Unlock quick-release fastener (3) for vent line and detach.

Measure gap dimension (A) at clamping ring (1).

Release hose clamp (2) and remove from clamping ring (1).

Press clamping ring (1) apart at open end and remove.

Installation note:

Make sure that service cover is installed in correct position.

The bulge (2) on the clamping ring must line up with the raised section (1) of the fuel tank.

The journal on the service cover (3) must line up with bulge on the clamping ring.

Hose clamp with torque breakaway head (4) always needs to be replaced.

During the tightening, press the service cap in the direction of arrow.

Tighten hose clamp until torque sheer head (4) breaks off.

Installation note:

Seal (1) must always be replaced.

Attach an auxiliary lead (1) to hose pack (2) through sensor opening.

The auxiliary lead is pulled through with the hose pack towards the left and facilitates subsequent reinstallation.

Installation note:

When guiding hose package through, make sure tank ventilation system is not damaged in tank tunnel.

Remove sensor unit (1) from fuel tank.

Thread sensor unit (1) with hose package (2) out of fuel tank.

Installation note:

When replacing sensor unit, remount end of auxiliary cable on new hose package and carefully pull in through fuel tank.


Figure on the dismounted fuel tank.