Mercedes Benz Workshop Service and Repair Manuals

Fuel Pressure: Specifications

W/ vacuum at pressure regulator [1] ........................................................................................................................................  3.2 - 3.6 bar (46.5 - 52.2 psi)
W/O vacuum at pressure regulator [1] .....................................................................................................................................  3.7 - 4.2 bar (53.7 - 60.9 psi)
Min. pressure retention after 30 min. [2] ............................................................................................................................................  min. 2.5 bar (36.3 psi)

[1]

Engine at idle

[2]

After engine is shut off