Fuel System, Filling/Bleeding

Special tools and workshop equipment required 

• Vehicle Diagnostic Tester

If fuel system components between the fuel tank and high pressure fuel pump are removed or replaced, then a bleeding must be performed.

Risk of destroying the fuel pump

After procedures on the fuel system it is possible to damage the fuel pump by running it dry.

-- Never let the fuel pump run dry.

-- Fill or bleed the fuel pump.

To fill the high pressure fuel pump with fuel, proceed as follows:

• Fuel gauge in instrument cluster checking, the fuel gauge must be outside of the reserve area.

-- Connect the Vehicle Diagnostic Tester => .

-- Select Diagnostic  operating mode and Start diagnostics  .

-- Select the Select individual test  tab and select the following tree structure consecutively:

• Drivetrain 
• Select the engine code and engine 
• 01 - OBD-capable systems  .
• 01 - Engine Electronics 
• 01 - Engine electronics, functions 
• Fuel pump activation 
• Press Preform the test 
• Select 120 seconds.

-- The fuel pump must run for approximately 120 seconds to make sure the fuel system is sufficiently filled with fuel.

-- Start the engine after filling the fuel system.

-- Let the engine run for a few minutes at an average speed and then shut it off.

-- Check the high-pressure system for leaks.

-- Perform a road test and fully depress the accelerator pedal at least one time.

-- Check the high pressure system again for leaks.