16 14 010 Removing and installing/replacing fuel pump (US vehicles with N51 engines)
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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!
Necessary preliminary tasks:
Release screws (1) and remove cover (2) from right side of fuel tank.
Disconnect plug connection (1).
Release union nut (2) and lay fuel feed line slightly to one side.
Ensure that sealing faces are clean.
Catch escaping fuel
Installation:
For tightening torque refer to 16 12 3AZ in 16 12 FUEL DELIVERY .
Unlock quick-release fastener of vent line (4) and detach.
Lever out remainder of torque breakoff head (1) (if provided) with a screwdriver in direction of arrow.
Release hose clip of clamping ring (2) completely.
Press clamping ring (2) part at open end in direction of arrow and remove.
Installation:
Make sure that service cover is installed in correct position.
Indentation (2) on clamping ring must line up with raised section (1) of tank.
Pin on service cover (3) must line up with indentation on clamping ring.
Hose clip with torque breakoff head (4) must always be replaced.
Tighten hose clip until torque breakoff head (4) breaks off.
Carefully raise service cover.
Unlock and disconnect vent line and fuel feed line (1).
Unlock retaining lugs (2) on both sides of plug housing (3) and detach plug housing (3) from service cover.
Installation:
When installing the service cover, make sure that seal (4) is correctly situated in the tank opening.
Seal (4) must always be replaced.
Remove service cover.
Disconnect plug connections (1) for both fuel level sensors.
Disconnect plug connection (2) for grounding cables.
Unlock and disconnect fuel feed line (1).
Turn fuel pump in direction of arrow (counterclockwise) and remove.
Installation:
Ensure correct engagement.