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

Engine 177 in model 217, 222 

Fig 1: Left Front Knock Sensor Component Location - Model 217 With Engine 177

Courtesy of MERCEDES-BENZ USA

	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-2500MNM
2	Release and disconnect electrical connector (6) and unclip electric line on holder
3	Remove screw (5) and remove knock sensor 3 (A16/3)	:  Clean contact surface. Assembly cleaner	*BR00.45-Z-1028-04A
		Bolt, knock sensor to crankcase	*BA15.10-P-1001-02G
4	Install in the reverse order
5	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
6	Perform an engine test run and check engine for proper function

KNOCK SENSORS

Number	Designation		Engine 177
BA15.10-P-1001-02G	Bolt, knock sensor to crankcase	Nm	20

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1028-04A	Assembly cleaner	A 000 986 56 01