How to Clean the Mass Air Flow on a Mercedes E430

Written by ashton daigle
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The mass airflow sensor, or MAF sensor, on your Mercedes E-430 monitors and regulates the airflow through the intake manifold. A clogged or otherwise blocked MAF sensor can negatively impact the performance of your Mercedes because the proper air-fuel ratio can become imbalanced. This can cause your Mercedes to run rough or die. Typically, MAF sensors are just replaced with new ones. However, you can try cleaning yours first with a spray cleaner designed for MAF sensors. This cleaner is sold at auto parts stores.

Skill level:
Moderately Easy

Things you need

  • Socket set
  • Screwdriver
  • Spray MAF sensor cleaner

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  1. 1

    Open the bonnet of your Mercedes and remove the negative battery cable.

  2. 2

    Find the MAF sensor on the rear of your Mercedes' engine neat the intake. UInplug the plastic wiring harness from the back of the sensor.

  3. 3

    Loosen the screw holding the MAF sensor hose in place and remove the hose from the MAF sensor.

  4. 4

    Loosen and remove the MAF sensor retaining bolts on your Mercedes and pull the sensor out.

  5. 5

    Set the sensor on a work bench or other flat surface. Spray the sensor down with the spray sensor cleaner. Turn the sensor over and spray the other side.

  6. 6

    Let your Mercedes MAF sensor dry for two hours. Set sensor back in place and insert retaining bolts. Replace MAF sensor hose and plug the wiring harness back into the sensor.

  7. 7

    Replace the negative battery cable on your Mercedes.

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