Remove/install a pressure sensor - AR07.04-P-0050LFB

ENGINE 157, 278 in MODEL 217 

ENGINE 157, 278 in MODEL 222 

Fig 1: Pressure Sensor Remove/Install Components

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	Detach ground line from battery	The ground line on the battery must always be detached before beginning work on the fuel system otherwise the system pressure will be built up through opening a vehicle door or the trunk lid.	AR54.10-P-0003LF
2	Remove engine covers
3	Remove right air filter housing		AR09.10-P-1150LFB
4	Remove insulation on right rail (1)
5	Disconnect electrical connection on fuel pressure and temperature sensor (B4/25)
6	Clean rail (1) in the area of the fuel pressure and temperature sensor (B4/25)	Assembly cleaner	*BR00.45-Z-1028-04A
7	Remove fuel pressure and temperature sensor (B4/25) from rail (1)	The fuel pressure and temperature sensor (B4/25) must be replaced after every disassembly.
		Pressure and temperature sensor to fuel distributor	*BA07.52-P-1002-01G
8	Install in the reverse order
9	Read out fault memory using the diagnostic system and clear if necessary		AD00.00-P-2000-04B
	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
10	Check fuel system for leaks with engine running