Hmm....it may be an error in transmission. I see it fine. Try doing a hard refresh of your page, control+F5 to reload it.
The HPFP pressurizes diesel fuel up to 26,107 psi (1800 bar) in an "accumulator rail", shown below on a CBEA engine, a common tube/rail shared by all of the fuel injectors. Unlike most common rail systems which are made by suppliers, VW makes the common rail themselves. (Bosch makes the fuel pump). Fuel is metered at the pump but a fuel pressure regulator valve on the right end of the rail also fuel pressure in the rail by bleeding off pressure.
thank you for bringing it up and if you still don't see it I'll try to figure out why.
Also, post moved to site correction/suggestions section.