Mercedes air suspension reset - How to calibrate

To reset the air suspension system on a Mercedes vehicle, follow these steps. This can be necessary after repairs, troubleshooting, or when the system shows warning messages. Note that specific steps may vary depending on the model and year, so always refer to the vehicle's service manual.

1. Identify and Confirm Issues – Verify if there are warning lights or error codes related to the air suspension system on the dashboard. Use a diagnostic tool (such as a Star Diagnosis system or a compatible OBD-II scanner) to read any stored fault codes in the system and record them for reference.

2. Inspect Air Suspension Components – Before performing a reset, inspect key components like the air compressor, air struts/springs, level sensors, air lines, and valves to ensure they are functioning properly. Replace or repair any components that show signs of damage or leaks. Ensure the battery is fully charged, as low voltage can affect the system’s operation.

3. Use a Diagnostic Tool – Connect the diagnostic tool to the vehicle’s OBD-II port and launch the appropriate software. For Mercedes vehicles, a Star Diagnosis system is commonly used:

• Select the vehicle model and year.
• Navigate to the “Chassis” or “Suspension” control module, usually labeled “AIRMATIC” or “ABC” (Active Body Control).
• Choose “Fault Codes” to review existing codes and clear them if necessary.

4. Reset Procedure (Mercedes air suspension reset) – Look for an option such as “Reset AIRMATIC,” “Reset Suspension,” or “Adaptation” within the diagnostic tool’s menu. Follow these steps:

• Enter the air suspension reset or adaptation mode.
• Confirm that the vehicle is on a flat and level surface, and ensure all doors are closed.
• Follow the on-screen prompts to complete the reset process.

5. Perform Calibration – Some Mercedes models require calibration after a reset to ensure proper ride height and system functionality. This may involve:

• Selecting the “Calibration” or “Height Adjustment” option in the diagnostic tool.
• Manually adjusting the ride height to match the factory specifications or allowing the system to auto-calibrate.
• Verifying that the vehicle raises and lowers smoothly and returns to the correct ride height.

6. Test Drive and Verification – After resetting and calibrating the system, take the vehicle for a short test drive. Ensure the suspension responds correctly in different driving modes and that no warning lights reappear on the dashboard.

7. Final Check – Use the diagnostic tool to perform one final scan to confirm that no new fault codes have been triggered. Ensure all system parameters are within normal operating ranges.

Important Notes – Resetting the air suspension system and calibration should be performed in a controlled environment to avoid potential safety issues. If you are not familiar with the diagnostic tools or the procedures, it is recommended to have a certified Mercedes technician perform the task.