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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
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).
If necessary, disconnect plug connection (1).
Remove cover (2).
Release nuts (1) and remove cover for sensor opening (2) from right side of fuel tank.
Disconnect plug connection (1).
Unlock quick-release fastener (2) and detach vent line.
If necessary, unlock quick-release fastener (3) for fuel delivery line of auxiliary heater and detach.
If necessary, disconnect plug connection (4) for auxiliary heater electric fuel pump.
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.
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.
Seal (1) must always be replaced.
Ground cable (1) must be replaced if it has been detached once!
Disconnect ground cable (1) towards top.
Carefully raise service cover.
Unclip plastic tube (1).
Unlock and disconnect snap fastener (2).
Catch escaping fuel in a suitable collecting vessel.
No fuel is permitted to get into the passenger compartment.
Remove the electric fuel pump.
With the electric fuel pump removed, disconnect plug connection (1) in fuel tank and renew ground cable (2).
Unclip fuel level sensor (1) from housing in the direction of the arrow and slide it out of the guides (2) in the direction of the arrow.Installation note:
Fuel level sensor (1) must noticeably and audibly engage.
Disconnect plug connection (1) and disengage cable (2) from guides.