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Home >> Mercedes Benz >> 2013 >> CL600 >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Electrical System - Engine -- Cl600 (216.376) >> Basic Knowledge >> Knock sensors, location/task/design/function - GF15.12-P-4101M

Knock sensors, location/task/design/function - GF15.12-P-4101M

ENGINE 275.950 in MODEL 215, 220 

ENGINE 275.951 in MODEL 230 up to Model Year 8 

ENGINE 275.953 in MODEL 216, 221 up to Model Year 8 

ENGINE 275.954 in MODEL 230 up to Model Year 8 

ENGINE 275.980 in MODEL 215, 220 

ENGINE 275.981 in MODEL 230 up to Model Year 8 

ENGINE 275.982 in MODEL 216, 221 up to Model Year 8 

ENGINE 285.950 in MODEL 240 

ENGINE 285.980 in MODEL 240 

Fig 1: Identifying Front And Rear Knock Sensors
G07541020Courtesy of MERCEDES-BENZ USA
Knock sensors, location   GF15.12-P-4101-01M 
Knock sensors, task The knock sensor detects vibrations at the crankcase.  
Knock sensors, design The knock sensor is a self-contained system.
Inside the sensor are piezo crystals. The screened cable is fitted directly onto the knock sensor.
 
Knock sensors, function   GF15.12-P-4101-02M