FixVault

Remove/Install Left Rear Knock Sensor - AR15.12-P-2187XGC

Engine 177 in model 463 

as of model year 2019 

Fig 1: Left Rear Knock Sensor Components Location - Engine 177 In Model 463 As Of Model Year 2019
G13656591Courtesy 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
  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Remove the expansion reservoir for the low-temperature circuit upward out of the elastomer bearings and place it to one side with the coolant lines still connected.   AR09.41-P-0001XGC
2 Release and disconnect the electrical connection for the knock sensor 4 (A16/4) at the separating point (1).    
3 Remove the retaining clip (2) from the cylinder head.    
4 Remove rear bottom engine compartment lining.   AR61.20-P-1105XG
5 Remove screw (3) and remove knock sensor 4 (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 
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 an engine test run and check the engine for proper function.    
KNOCK SENSORS

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