| Filling, bleeding fuel system |
Caution | Risk of damage to high-pressure pump when running dry. |
| The high-pressure pump must first be filled with fuel before the engine is started. The high-pressure pump must not be allowed to run while still empty. |
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| When installing the high-pressure pump, it is essential to ensure that no dirt enters the fuel system. |
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| Only remove sealing plugs immediately prior to installation of fuel lines. |
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| There must be sufficient fuel in the tank. |
| Proceed as follows to fill high-pressure pump with fuel. |
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| Connect the central diagnosis -VAS 505X-. |
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| Connect vehicle diagnosis tester and perform the guided function „Bleeding fuel system“ or „Filling/bleeding fuel system“ depending on software version. |
Note | The fuel pumps will now be activated for a total of 3 minutes. |
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| Start engine after filling fuel system. |
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| Run engine at moderate speed for several minutes and then switch off. |
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| Ensure that the fuel system is completely sealed. |
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| Then test drive the vehicle over a distance greater than 20 km with at least one full acceleration. Then check high-pressure part of fuel system again for leakage. |
Note | If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and erase the fault memory. Then continue road test. |
Note | If there is any air left in the fuel system, the engine may switch to the backup mode ('emergency running' mode) during the road test. Switch off the engine and erase the fault memory. Then continue road test. |
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| Read out the event memory |
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