E320 1999

Mass Air Flow Sensor (Hot Wire)

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Removal & Installation



M112 And M113 Engines
  1. Before servicing the vehicle, refer to the precautions.
  2.  
  3. Remove air filter housing.
  4.  
  5. Remove the electrical connector at the hot film mass air flow sensor.
  6.  
  7. Disengage the right notch of the hot film mass air flow sensor at the resonance intake manifold.
  8.  
  9. Unlatch left notch for hot film MAF sensor on resonance intake manifold and tip hot film MAF sensor somewhat to the rear.
  10.  
  11. Disengage the spring steel sheet and remove the hot film mass air flow sensor from the air duct housing.
  12.  
  13. Check seal between air duct housing and hot film MAF sensor for damage; replace if necessary.
  14.  
  15. Check right notch, left notch and spring steel sheet for damage; replace if necessary.

    Click image to see an enlarged view

    Fig. MAF sensor location

  16.  

To install:

  1. Installation is the reverse of removal.
  2.  
  3. Connect STAR DIAGNOSIS or equivalent scan tool and read out fault memory.
  4.  

 
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