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

Engine 176 in model 217, 222 

Fig 1: Left Front Knock Sensor Component Location - Model 217 With Engine 176

Courtesy of MERCEDES-BENZ USA

	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
Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove engine with front axle carrier		AR01.10-P-2500MNL
2	Remove hydraulic pump	Engine 176 in model 217, 222 with code 487 (Active Body Control (ABC))	AR32.50-P-0030LFM
3	Remove coolant line (6) from engine	Bolt, coolant feed pipe to crankcase/cylinder head/engine carrier/belt tensioner	*BA20.20-P-1002-01Q
		M6 X 1	*BA00.10-P-1002-04A
4	Release, disconnect and unclip electrical connector (4)
5	Remove screw (5) and remove knock sensor 3 (A16/3)	:  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
6	Install in the reverse order
7	Read out and erase fault memory
			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
8	Perform an engine test run and check engine for proper function

METRIC SCREWS/BOLTS AND NUTS AS PER MBN 10 105, 10 143

Number	Designation		8.8	10.9
BA00.10-P-1002-04A	M6 X 1	Nm	9	13

KNOCK SENSORS

Number	Designation		Engine 176
BA15.10-P-1001-02G	Bolt, knock sensor to crankcase	Nm	20

RADIATOR, COOLANT HOSES

Number	Designation		Engine 176 in model 217, 222 Engine 176 in model 463 up to model year 2019
BA20.20-P-1002-01Q	Bolt, coolant feed pipe to crankcase/cylinder head/engine carrier/belt tensioner	Nm	9