Remove/install fuel injectors - AR07.03-P-0004RKB

ENGINE 157, 278 in MODEL 231 

Shown on model 231.473 

Fig 1: Fuel Injectors Remove/Install Components - Shown On Model 231.473

Courtesy of MERCEDES-BENZ USA

	Risk of explosion  caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contact with fuel.	No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
	Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof.	No parts of the body or limbs should be within the operating area when the components are moving.	AS00.00-Z-0011-01A
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Remove/install
1	Disconnect battery ground line		AR54.10-P-0003RK
	Notes on battery		AH54.10-P-0001-01A
2	Remove rail		AR07.03-P-1010RKB
3	Mark fuel injectors (Y76) relative to the respective cylinder	If fuel injectors (Y76) are replaced, the transport protective caps on the fuel injectors (Y76) should not be removed until one hour before assembly at the earliest. Leaks can occur otherwise. When reusing the fuel injectors (Y76) they must be inserted into the cylinder in which in which its was previously installed.
4	Remove fuel injectors (Y76) from the cylinder head	Oil which comes out during disassembly of the rail or from the fuel injectors (Y76) is safe. The rail or the fuel injectors (Y76) can be re-used. The fuel injectors (Y76) must be installed together with the rail. In case of jammed fuel injectors (Y76): ↓ Remove injection nozzle (Y76).	AR07.03-P-0004-03MM
		Puller	Figure
	Check
5	Check fuel injectors (Y76) for outer damage	For damage to the stems or to the mount on the sealing package on the fuel injectors (Y76) the fuel injectors (Y76) must installed new.
6	Replace sealing rings (2) and seals (4) on the fuel injectors (Y76)
7	Replace sealing rings (3) for fuel injectors (Y76)	Fuel injectors (Y76) must be installed immediately after calibration of the sealing rings (3). The sealing rings (3) will swell otherwise under the influence of the air humidity and will therefore be damaged in during assembly.	AR07.03-P-0004-01MM
		Assembly cleaner	*BR00.45-Z-1028-04A
		Assembly tool	Figure
8	Install in the reverse order
9	Store injector quantity compensation (IMA) coding in the ME-SFI [ME] control unit (N3/10)	For installation of new fuel injectors (Y76)
			AD00.00-P-2000-04A
10	Read out fault memory using the diagnostic system and clear if necessary
			AD00.00-P-2000-04A
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
11	Carry out an engine test run, checking the engine for proper operation and leaktightness of the fuel system

Fig 2: Identifying Puller (278 589 00 33 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Assembly Tool (272 589 00 43 00)

Courtesy of MERCEDES-BENZ USA