Evaporative Emissions System: Service Precautions

Safety Precautions

Note the following when working on the fuel system:


There is a risk of injury because the fuel is under very high pressure.

• Reduce the fuel pressure down to residual pressure before opening the high pressure area of the fuel injection system.

• To reduce remaining residual pressure, place a clean cloth around the connector and carefully loosen connector.

- Procedures before opening high pressure fuel injection system.

Carry out the following measures before starting work on the fuel supply:


Risk of explosion due to cell phones.

• Keep the cell phones out of reach in the work space area.


Risk of destroying electrical components.

• Observe measures for disconnecting battery.

• Disconnect the battery - arrow -.






• Open the fuel filler flap briefly and then close it again.

Note the following when removing and installing components from a filled or partially filled fuel tank:

• The fuel tank may only be partially full. How much fuel can remain in the fuel tank may be read in the respective work description. Empty the fuel tank, refer to => [ Fuel Tank, Draining ] Procedures.

• Before starting work, switch on the exhaust extraction system and place an extraction hose close to the installation opening of fuel tank to extract escaping fuel fumes. If no exhaust extraction system is available, a radial fan (as long as the motor is not in the air flow) with a displacement greater than 15 m3/h can be used.

• Prevent fuel from contacting skin! Wear fuel-resistant gloves!

Note the following when removing and installing the fuel tank:

• Fuel tank must be empty for weight reasons. Empty the fuel tank, refer to => [ Fuel Tank, Draining ] Procedures.