How to Reset Mercedes W212 Air Suspension

Resetting the air suspension on a Mercedes-Benz W212 (E-Class) involves a series of steps, as this system is often controlled by the vehicle's onboard diagnostics. Here’s a general guide to help you through the process:

1. Ensure Vehicle is in Park Mode: Make sure the car is on level ground and the parking brake is engaged.

2. Turn off the engine of the Mercedes W212: Shut off the engine and let the vehicle sit for a few minutes. This ensures the suspension system is completely powered down.

3. Locate the Air Suspension Reset Button: Mercedes W212 Air Suspension Reset: The W212 often has a button for resetting or recalibrating the air suspension. This button can be located in the trunk, near the compressor, or sometimes within the vehicle's control menu. Refer to the owner’s manual for the exact location.

4. Check for Error Codes: If the air suspension isn’t working properly, there may be fault codes. Use a diagnostic scanner (such as the STAR Diagnostic tool or a third-party OBD-II scanner) to check for any air suspension-related error codes. If codes appear, address the issues before continuing.

5. Press the Reset Button: If your model has a dedicated reset button, press and hold it for a few seconds until you hear the system reset. This may cause the suspension to re-adjust and recalibrate.

6. Use the Vehicle’s Menu (if applicable): On some models, you can reset the suspension through the vehicle’s infotainment system. Navigate to the settings menu and find the suspension or vehicle settings to reset or recalibrate the system.

7. Wait for the System to Recalibrate: After resetting, allow the system some time to recalibrate. This could take a few minutes as the air suspension adjusts the ride height to the desired levels.

8. Check for Leaks: After resetting, it’s a good idea to check for any air leaks in the system, especially around the compressor and air suspension bags. If you hear any unusual hissing sounds or if the suspension doesn’t level out, there may be a leak or malfunction.

9. Test Drive W212: Once the system has been reset and calibrated, take the car for a short drive to make sure the air suspension is functioning correctly.

Mercedes Air Suspension Reset: If the air suspension problem persists after resetting, it’s best to consult a professional mechanic or a Mercedes-Benz service center. Sometimes, more serious issues with the compressor, air springs, or control modules may require replacement or repair.