Link: www.acrobat-rental.co.uk
2 on top of the fuel filter there is a black plastic thermo valve which opens when the fuel is at operating temperature these are never replaced and leak air around the seal fit a genuine filter and valve just a cheap from Mercedes as pattern part rubbish
Both fo those faults will cause your code
Also as mentioned check the rail control valve seals
the Low pressure side should run at 2,5 to 4 bar
a normal one runs at 2.8 bar at idle
If you have changed the injectors
and the Rail control valve seals
i would concentrate on the fuel supply from the tank then you should find your problem
Oh and a chassis number would be good so i know i am giving you the right info
HTH
Kev Gundry
email me if you want a chat
kevin@acrobat-rental.co.uk
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