Draining The Fuel System

Fuel Tank, Fuel Lines And Evaporative System

Draining the fuel system

Special Tools: 981 2270, 981 2273, 981 2282, 999 5480, 999 5484

Safety
See Safety regulations for handling fuel.

Engagement







Remove the cover on the valve which is positioned on the fuel rail.

Connect adapter 999 5484 to fuel draining unit 981 2270, 981 2273 and 981 2282.

Connect the adapter to the valve on the fuel rail in the locked position (figure 1, valve closed).

Start the fuel drainage unit.

Unlock the adapter (illustration 2 valve open).

Raise the car.

Draining the fuel system







Remove the cover on the valve cap positioned at the fuel filter.

Connect venting hose 999 5480 to the valve prior to the fuel filter.

It takes approximately 2 minutes to evacuate the system.

Installation
Reinstall the components in reverse order.

CAUTION: Do not forget to reinstall the valve caps.

Fuel tank, draining

NOTE: As the illustrations in this service information are used for different model years and/or models, some variation may occur. However, the essential information in the illustrations is always correct.

Preparation
Disconnect the battery negative terminal. See Note when disconnecting/connecting the battery lead.

WARNING: RISK OF EXPLOSION! THE USE OF A FRESH AIR MASK IS RECOMMENDED.

Draining fuel tank
Insert a hose 1.3 meters into the fuel filler pipe, measured from the edge of the opening of the filler pipe.

Pump until air comes out.

NOTE: Always ensure that there is a ground connection between the fuel intake and the fuel filler pipe.