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Home >> Mercedes Benz >> 2021 >> GLS450 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 167 Chassis >> Testing & Repair >> Remove/Install Knock Sensor >> Remove/Install Left Rear Knock Sensor - AR15.12-P-2187MNP
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Remove/Install Left Rear Knock Sensor - AR15.12-P-2187MNP

Engine 177 In Model 167 

Fig 1: Left Rear Knock Sensor Components Location - Engine 177 In Model 167
G14790203Courtesy of MERCEDES-BENZ USA
WARNING 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
CAUTION 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
REMOVINGINSTALLING Remove/install     
1 Remove front axle differential.   AR33.30-P-0525MSC
2 Remove electrical connector (1) and release and disconnect.    
3 Remove screw (2) and remove knock sensor (A16/4) downward. INSTALLATION NOTES
The contact surface must be free from soiling.
Otherwise, knock sensor 4 will malfunction (A16/4).
 
    TORQUE SPECIFICATION Bolt, knock sensor to crankcase *BA15.10-P-1001-02G 
4 Install in the reverse order.    
INSPECT Check     
WARNING 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
WARNING 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 Perform engine test run. While doing so, check engine for proper operation and leak tightness    
KNOCK SENSORS

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