FixVault

Remove/Install Right Rear Knock Sensor - AR15.12-P-2189MNL

Engine 176 in model 217, 222 

Fig 1: Right Rear Knock Sensor Component Location - Model 217 With Engine 176
G15347451Courtesy 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 lower center and rear engine compartment paneling   AR61.20-P-1105LF
2 Remove screw/bolt (1) and remove bracket (2) TORQUE SPECIFICATION M6 X 1 *BA00.10-P-1002-04A 
3 Release and disconnect electrical connection (6)    
4 Unscrew bolt (5) and remove and knock sensor 2 (A16/2) INSTALLATION IMPORTANT The contact surfaces must be free from soiling.
Otherwise, the knock sensor 2 (A16/2) will malfunction.
 
    TORQUE SPECIFICATION Bolt, knock sensor to crankcase *BA15.10-P-1001-02G 
5 Install in the reverse order    
6 Read out and erase 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
7 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