Removing and installing diaphragm pressure regulator (ME) - AR07.17-P-1452E

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 119.981 /982 /985

Fig 1: Identifying Diaphragm Pressure Regulator, O-Ring And Circlip

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig. item, etc.	Work instructions
	Risk of explosion	Pay attention to accident prevention regulations!
	Release fuel pressure through service valve at fuel rail	see Diagnosis Manual Engine, Volume 2, Index 3.1
			Figure
			Figure
46, 47	O-rings	replace, oil for installing

Fig 2: Identifying Tester (103 589 00 21 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Pressure Hose (119 589 04 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.