Changed Fuel filter housing

[Lekso]

Hi guys, my mercedes vito 2012 started leaking coolant so we diagnosed it and found out it was the fuel filter housing that needed replacing. After replacing it, the leaking has stopped but the bus won't start now... the diagnostics do not show anything so we literally do not know what the issue is? We have taken the housing out again and taken the cables and pipes out cleaned them and put them back on but it will still not start. I changed the camshaft sensor as the AA recovery said there is no signal coming from it but it still doesn't start.

Can anyone please help me, it would be much appreciated.

 

[mioba]

Air in the system perhaps. have you tried a bellows pump to get fuel through. Is the fuel pump working or did it burn out pushing air.

just sone thoughts

 

[mersum1es]

can you see live data? rail pressure...?