| Checking fuel system for leaks |
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| Clean all removed and re-installed fuel connections with brake cleaner and then dry them. |
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| Run engine at idling speed for several minutes - do not press accelerator - and then switch engine off again. (Fuel system bleeds itself). |
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| Check the entire fuel system for leaks. |
| Renew the affected component if leakage still occurs after tightening to the correct torque. |
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| Then test drive the vehicle with at least one full acceleration. Then thoroughly 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. |
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