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Submitted by AutoCeli on September 24, 2019
Mercedes Air Suspension Release Valve Problems and Replacement

We had a Mercedes-Benz E-Class with air suspension that was displaying the Airmatic Malfunction warning message on the dashboard even though the suspension seemed to operate properly.

The vehicle did not drop when parked for a long time.

After scanning the system, we found this fault code:

  • 5350 - A9/1y1 Airmatic pressure release valve - Open circuit

The owner had taken the vehicle to a Mercedes-Benz mechanic who recommended the air suspension compressor.

To fix this problem, you don't need to replace the air suspension compressor.

Possible Solutions

  1. Jack up the vehicle and secure it. Remove the wheel by the air compressor suspension. The air suspension compressor is located behind the front bumper. You access it by either removing the lower splash shield or by removing the wheel well liner. It is on the driver's side or passenger's side, depending on the model.remove air suspention air release valve


  2. Locate the air suspension release valve.Mercedes Air Suspention Air Release Valve Solenoid


Here is what you need to do.

remove air suspention air release valve wire harness
  1. Check the wire harness to the air release valve (solenoid). The wire harness that connects to the air suspension compressor can get damaged. Once this happens, you will get the Airmatic Failure Visit Workshop on the dashboard.
  2. Remove the air release valve and ensure it is not stuck. Cleaning the air release valve can sometimes fix the problem. Especially if the plunger is stuck due to dirt or rust built around the solenoid.
  3. Replace the air release valve. Sometimes you may not be able to fix the air release valve. If you can find another unit, you can change the air release valve only. It is held in place with two 25 Torx bolts and takes less than 5 minutes to replace.