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How to Replace Air Suspension Compressor on Mercedes-Benz R, ML, GL Class

DIY Cost: $ 150 - 200
Est. Time: 30 mins - 1 hour
Difficulty: Easy

Summary

Step-by-step procedure on how to replace the air suspension compressor of the Mercedes Benz R-Class R-Class, ML-Class, GL-Class

What you will need

Procedures

  1. Park the vehicle on a safe ground level and set the parking brake. Turn off the engine
  2. Put wheel chocks behind the back wheels to prevent the car from rolling.
  3. Loosen the lug nuts of the front wheel on the passenger side. Use a lug wrench or breaker bar to loosen the nuts.
  4. Jack up the vehicle and put jack stands on the frame to support the vehicle.
  5. Remove the lug nuts from the wheel and carry the wheel out of the vehicle.
  6. Detach the wheel liner by removing the plastic clips and nuts on the wheel liner.Removing the wheel liner out of the vehicle.

     

  7. Spray penetrating oil on the bolts of the air suspension compressor.The location of the bolts on the air compressor.

    The other bolt is located on the other side of the air compressor.

  8. Detach the electrical connectors and hoses connected to the air suspension compressor. To remove the hose with copper nut, twist the copper nut counterclockwise and slide it on the airline hose.Removing the electrical connectors connected to the air compressor.

    Press the clip to unlock the connector from the air suspension compressor.

    The copper nut holding the airflow hose to the air compressor.
  9. Remove the air suspension compressor from the vehicle. Remove the bolt on the other side of the air suspension compressor and let someone hold the air compressor, then remove the two bolts.The bolts holding the air compressor.

    The other bolt is on the other side of the air compressor. Use a deep socket wrench to remove the bolts.

  10. Install the new air suspension compressor by lining it up back to the three bolts. Reinstall the nuts starting with the ones in front.The rubber pieces that holds the air compressor.

    Make sure that the rubber pieces are mounted in the right direction 

  11. Put the new copper nut on the airline hose and line up the o-ring into the airline hose. Then connect the hose back to the air compressor by turning it clockwise.Reinstalling the airline hose back to the air compressor.

     

  12. Connect the electrical connectors and hoses to the new air suspension compressor.Reconnecting the electrical connectors back to the air compressor.

     Insert the electrical connectors into the new air suspension compressor.

    Reinstalling the hose back to the air compressor.
  13. Reinstall the wheel liner by putting the nuts and plastic retainers back on.
  14. Reinstall the wheel and the lug nuts back unto the vehicle.
  15. Torque the lug nuts to specification, typically 110ft/lb.
How to Replace Air Suspension Compressor on Mercedes-Benz R, ML, GL Class What you will need Air suspension compressor (Mercedes Benz) Lug nut wrench Jack Metric Socket Set Jack stands (2x)