Remove/Install Differential Fuel Pressure Sensor - AR07.04-P-0025MSC

Engine 256.9 In Model 167 

Fig 1: Differential Fuel Pressure Sensor Components Location - Engine 256.9 In Model 167

Courtesy of MERCEDES-BENZ USA

	Risk of burn injuries  , suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust.	Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.	AS49.00-Z-0001-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Remove upper engine cover.	Do not install upper engine cover until after the leak test.	AR01.10-P-2405MSC
2	Remove crash plate (1).
3	Remove heat shields (7).	Nut, heat shield to exhaust gas turbocharger	*BA09.40-P-1004-02MRT
4	Release and disconnect electrical connection (3).
5	Open clamps (5) and remove molded hoses (4) from pressure lines.	Remove the clamps (5) only from the molded hoses (4) on pressure lines. Otherwise, the gasoline particulate filter differential pressure sensor (B163/3) will be damaged. Install molded hoses (4) free of tension. Replace clamps (5). Pliers for click clamps	Fig 2
6	Remove gasoline particulate filter differential pressure sensor (B163/3) together with molded hoses (4) and bracket (2).
7	Unscrew nuts (6) and remove bracket (2).	When replacing the gasoline particulate filter differential pressure sensor (B163/3).
8	Remove molded hoses (4) from gasoline particulate filter differential pressure sensor (B163/3).	When replacing the gasoline particulate filter differential pressure sensor (B163/3). Replace clamps. Pliers for click clamps	Fig 2
9	Install in the reverse order.
10	Read out and delete fault memory.
			AD00.00-P-2000-06ME
	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 engine test run and check engine for proper operation and leak tightness.
12	Install upper engine cover.		AR01.10-P-2405MSC

TURBOCHARGER

Number	Designation		Engine 256.9
BA09.40-P-1004-02MRT	Nut, heat shield to exhaust gas turbocharger	Nm	8

Fig 2: Identifying Pliers For Click Clamps (171 589 00 37 00)

Courtesy of MERCEDES-BENZ USA