2003 Mercedes c270 cdi cranks but wont start

[crazy123]

can u show me the diagram of the aux pump?

 

[mersum1es]

See miggit posts above

 

[crazy123]

ok and if the diesel starts pouring out what do i do next?

 

[mersum1es]

Do a injector leak back test, see if there are air bubbles in clear fuel lines

 

[crazy123]

Do a injector leak back test, see if there are air bubbles in clear fuel lines

the engine ran fine before the crash the injectors couldnt be bad

 

[mersum1es]

I try to think rationally non start problem (forgetting crash); first we need to check is there fuel pressure; you said no so pressure is culprit.
Why would pressure fail: fuel starvation (blocked filter, saddle tank syndrome, blocked fuel line, dead aux pump), insufficient pressure (air ingress in low pressure lines, excessive leak in injector, worn hp pump, leaky or stuck pressure valve), wrong pressure reading (faulty pressure sensor).

Edit: you didnt answer my previous question...

 

[crazy123]

Found the problem , there was air in the fuel rail .