I know on my old M57 powered E39 530d (Same engine)...at idle it was between 337 and 348 bar (ignore the 'm'):



It needs to be over 200bar during cranking to start the engine.
 
This is taken from the manual

The low pressure system pressure is approx. 1.5 bar to 5 bar and return end < 0.6 bar. The pressure in the high pressure end is 200 bar to 1350 bar.
 
This is taken from the manual

The low pressure system pressure is approx. 1.5 bar to 5 bar and return end < 0.6 bar. The pressure in the high pressure end is 200 bar to 1350 bar.
Guessing that's why you don't get body parts anywhere near high pressure lines and injectors
 
@marty21705 if you are thinking fuel pressure issue it may be worth looking at the high pressure regulator as it's a common problem. And relatively easy to change as you don't need to take the high pressure pump off to refurb the regulator.
 

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