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Home >> Mercedes Benz >> 2021 >> G550 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Electrical System - Engine - 463 Chassis >> Testing & Repair >> Remove/Install Left Front Knock Sensor >> Remove/Install Left Front Knock Sensor - AR15.12-P-2186XGA
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Remove/Install Left Front Knock Sensor - AR15.12-P-2186XGA

Engine 176 in model 463 

as of model year 2019 

Fig 1: Left Front Knock Sensor Components Location - Engine 176 In Model 463 As Of Model Year 2019
G13656585Courtesy 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  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
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
  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
REMOVINGINSTALLING Remove/install     
1 Drain engine oil.    
REFER TO MAINTENANCE     AP18.00-P-0101GE
    INSTALLATION IMPORTANT : Only install lower engine compartment paneling after leak test.  
2 Remove refrigerant compressor.   AR83.55-P-5310XGA
3 Remove oil line (6) from engine, oil pan, and left engine carrier, place to one side, and seal openings with suitable stop plugs. INSTALLATION IMPORTANT : Install new sealing rings.  
    TORQUE SPECIFICATION Bolt, oil line to oil pan/crankcase/engine support *BA01.45-P-1001-01Y 
    SPECIAL TOOL
Record plug
Fig 2
4 Release and disconnect the electrical connector for knock sensor 3 (A16/3) at the separating point (8).    
5 Remove screw (7) and remove knock sensor 3 (A16/3) toward the front. INSTALLATION NOTES
The contact surfaces must be free from soiling.
Otherwise, knock sensor 3 will malfunction (A16/3).
 
    TORQUE SPECIFICATION Bolt, knock sensor to crankcase *BA15.10-P-1001-02G 
6 Install in the reverse order.    
7 Read out and delete fault memory.    
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
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
8 Perform engine test run and check engine for leak tightness and function.    
9 Install lower engine compartment lining.   AR61.20-P-1105XG
OIL PAN

Number Designation Engine 176
BA01.45-P-1001-01Y Bolt, oil line to oil pan/crankcase/engine support Nm 8
KNOCK SENSORS

Number Designation Engine 176
BA15.10-P-1001-02G Bolt, knock sensor to crankcase Nm 20
Fig 2: Identifying Record Plug (129 589 00 91 00)
G13656586Courtesy of MERCEDES-BENZ USA