Removing and installing diaphragm pressure regulator - AR07.17-P-1450D

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE 104.94 /99, 111.920 /921 /94 /96 /970 /973 /974 /975 (except 104.990)

Shown on engine 104

Fig 1: Identifying Diaphragm Pressure Regulator Components - Shown On Engine 104

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Shown on engine 111.975

Fig 2: Identifying Diaphragm Pressure Regulator Components - Shown On Engine 111.975

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Removing, installing
	Risk of explosion as a result of ignition. Risk of poisoning as a result of inhaling and swallowing fuel Risk of injury to skin and eyes as a result of contact with fuel	No fire, naked flame or smoking. Pour fuels only into suitable and appropriately marked vessels Wear protective clothing when handling fuel	AS47.00-Z-0001-01A
1.1	Release fuel pressure through service valve (1/1)		Figure
			Figure
1.2	Remove cover of diaphragm pressure regulator (40)	Engine 111.945 in model 208
2	Detach vacuum hose (40/11)
3	Remove circlip (40/10)	Installing: inspect for re-use
4	Take out diaphragm pressure regulator (40) at fuel rail (17)
5	Install in the reverse order	Installing: replace O-rings (40/8) and (40/9), oil to facilitate installation

Fig 3: Identifying Tester (103 589 00 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Pressure Hose (119 589 04 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.