Remove/Install Knock Sensors - AR15.12-P-2184MND

Engine 276.8 in model 213, 238 

Shown on engine 276.823 

Fig 1: Right Knock Sensor Components Location - Engine 276.823 In Model 213

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.823 

Fig 2: Left Knock Sensor Components Location - Engine 276.823 In Model 213

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.853 

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.853 with code M005 (4MATIC), left knock sensor 

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.823 without code M005 (4MATIC), left knock sensor 

Courtesy of MERCEDES-BENZ USA

Shown on engine 276.853 with code M005 (4MATIC), right knock sensor 

Courtesy of MERCEDES-BENZ USA

	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Risk of injury  . Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	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
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	General information on work on gasoline direct injection system		AH07.00-P-2000-01A
	Remove/install
1	Remove left air filter housing		AR09.10-P-1151MND
		Only install upper engine cover after the leak test.
2	Remove right air filter housing		AR09.10-P-1152MND
3	Remove lower front center, center and rear engine compartment paneling		AR61.20-P-1105LWE
		Only install lower front, center and rear engine compartment paneling again after a leak test.
4	Remove left catalytic converter		AR49.10-P-5502MND
5	Remove right catalytic converter		AR49.10-P-5503MND
6	Remove heat shield (29) over the crankshaft Hall sensor		AR15.12-P-2136MND
7	Remove heat shield over starter	Engine 276.8 in model 213, 238 with code M005 (4MATIC)	AR15.30-P-7100MNG
		Engine 276.8 in model 213, 238 except code M005 (4MATIC)	AR15.30-P-7100MND
8	Unscrew screws/bolts (21) of heat shield (20) of left knock sensor (3)	Screw/bolt, heat shield of knock sensor to crankcase/engine support/bracket	*BA15.10-P-1002-02B
9	Remove heat protection over left knock sensor (3)
10	Unscrew screws/bolts (23) of heat shield (22) of right knock sensor (9)	Engine 276.8 in model 213, 238 with code M005 (4MATIC)
		Screw/bolt, heat shield of knock sensor to crankcase/engine support/bracket	*BA15.10-P-1002-02B
11	Remove exhaust gas recirculation line	Engine 276.853 in model 213
			AR14.20-P-0001MND
12	Remove screws/bolts (26)	Engine 276.853 in model 213
		Screw/bolt, heat shield to exhaust gas recirculation line (center) bracket	*BA14.20-P-1012-01M
13	Lift out heat shield (25) upwards	Engine 276.853 in model 213
14	Remove bolts (6)	M6X1	*BA00.10-P-1002-04A
15	Release and disconnect electrical connection (4)
16	Unclip electrical connector (4) and electric line (1) from bracket (5)
17	Unclip electrical line (1) from clamp (2)
18	Unclip electric line (1) to right knock sensor (9) on crankcase
19	Separate cable tie (11) on electric line (1) to left knock sensor (3)	Replace cable tie (11).
20	Unscrew screws/bolts (7, 8) and remove knock sensors (3, 9) together upwards	The knock sensors (3, 9) can only be removed together with the electric line (1).
		Bolt, knock sensor to crankcase	*BA15.10-P-1001-02B
21	Install in the reverse order
	Check
22	Read out and erase fault memory
		Engine 276.8 in model 213	AD00.00-P-2000-04B
		Engine 276.8 in model 238	AD00.00-P-2000-06LWO
	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 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
23	Perform an engine test run; check engine for functionality and leaktightness