I think on some diesel cars you need to prime the system again to get the air out by running the in tank pump. Had a quick look on Elsa Win.
Bleeding fuel system
If components of the fuel system between the fuel tank and the high-pressure fuel pump are removed or renewed, the basic setting “Checking fuel system pressurisation pump” must be performed to bleed the fuel system.
Proceed as follows to fill fuel system with fuel:
– Connect a vehicle diagnostic tester.
– Switch on ignition.
– Select “Engine electronics” in vehicle self-diagnosis.
– Then select “Basic setting”.
– Select “Checking fuel system pressurisation pump” from the list.
– Press “Start” key: The fuel pump will start running.
– The fuel pump must run for approx. 1 minute to ensure that the high-pressure pump is filled with sufficient fuel.
– Press “Stop” key.
To repeat basic setting, switch ignition off and on once. Then start basic setting again.
– Start engine after filling fuel system.
– Run engine at moderate speed for several minutes and then switch off.
– Check fuel system for leaks.
– Erase event memory.
– After completing the repair, road-test the vehicle. Accelerate with full throttle at least once. Then check the high-pressure section of the fuel system again for leaks.
