Remove/Install Left Front Knock Sensor - AR15.12-P-2186MNO

Engine 176, 177 In Model 167 

Fig 1: Left Front Knock Sensor Components Location - Engine 176 In Model 167

Courtesy of MERCEDES-BENZ USA

Shown on Engine 176 In Model 167 

Fig 2: Left Front Knock Sensor Components Location - Engine 177 In Model 167

Courtesy of MERCEDES-BENZ USA

Shown on Engine 177 In Model 167 

	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  To skin and eyes due to handling of Engine oil. Risk of poisoning  caused by swallowing Engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill Engine oil into beverage containers.	AS18.00-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	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove oil line (3).		AR18.00-P-1001MNO
		: Only install lower Engine compartment paneling after leak test.
2	Remove electrical connector (2) and release and disconnect.
3	Remove screw (4) and remove knock sensor 3 (A16/3) toward the front.	The contact surfaces must be free from soiling. Otherwise knock sensor 3 (A16/3) will malfunction.
		Bolt, knock sensor to crankcase	*BA15.10-P-1001-02G
4	Install in the reverse order.
	Check
	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
5	Conduct engine test run while checking for proper operation of the engine.