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Home >> Mercedes Benz >> 2011 >> SL65 >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Electrical System - Engine - 230 Chassis >> Basic Knowledge >> Knock sensors, location/task/design/function - GF15.12-P-4101 >> Knock sensors, location/task/design/function - GF15.12-P-4101M >> Notes
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Knock sensors, location/task/design/function - GF15.12-P-4101M: Notes

ENGINE 275.950 in MODEL 215, 220 

ENGINE 275.951 in MODEL 230 

ENGINE 275.953 in MODEL 216, 221 

ENGINE 275.954 in MODEL 230 

ENGINE 275.980 in MODEL 215, 220 

ENGINE 275.981 in MODEL 230 

ENGINE 275.982 in MODEL 216, 221 

ENGINE 285.950 in MODEL 240 

ENGINE 285.980 in MODEL 240 

Fig 1: Identifying Knock Sensors, Location - A29/1, A29/2
G04840186Courtesy 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