Is the AirMatic Pump Motor Failure in Mercedes Due to a Sticking Relay?

Mercedes vehicles are special and unique, and therefore require specialized care. Mercedes are reputable for power, endurance, and luxury—three qualities that are simultaneously difficult to come by in the automotive industry, and even further difficult to maintain. However, there are common issues that Mercedes drivers tend to experience that can significantly impact the integrity of these vehicles.

One such issue is with the AirMatic pump motor. If you’re not sure what the heck an AirMatic pump motor is, don’t panic—you’re not alone. The complexity of automotive mechanics is often lost on the average individual, but reading this article can help you obtain a little foundational knowledge and clarity. This common Mercedes issue has been talked about for years, and the solution always involves the help of an automotive shop with specialized experience working with German engineering, particularly a variety of Mercedes models. In this article, we’ll answer some of the most burning questions about your Mercedes’ performance in regard to the AirMatic pump motor.

Q: What does the AirMatic pump do for your Mercedes?

A: Your Mercedes’ AirMatic pump is a specially designed system that ensures the function and performance of the vehicle’s suspension. Air suspension systems work with a number of different components, including compressors, pumps, and motors that use air to fill the suspension to keep it lifted off the wheels and appropriately absorbing road impacts. The AirMatic pump is a specialized part that pumps air into the suspension, and when it isn’t working properly, it can cause serious issues with your car’s functionality.

Q: What does a relay do for the system?

A: Your air suspension utilizes a relay to turn the AirMatic pump on and off. It is usually designed with sensors that detect when the driver’s door is opened to prep the suspension for “take off,” and it usually turns the pump off after it detects that the engine has been shut off. While it is normal for the pump to run for a few moments after the engine has been cut, drivers tend not to realize that the pump often continues running while the car is parked, leaving them with a host of issues when they return.

Q: What are the most common signs of AirMatic Pump Failure?

A: The biggest indicator that your Mercedes AirMatic pump is failing is that your suspension isn’t sitting properly. If you notice your Mercedes has become significantly lower than usual, the problem is likely related to your air suspension. To save energy, the system shuts off while the car isn’t in use—and while it tends to run for a moment after the car is shut off, it should not run for much longer.

Q: How can you determine where the problem originated?

A: AirMatic pump failure can be due to a number of different causes, not just a sticking relay. However, if the problem is due to a sticking relay, then the pump will not shut off while the car is parked. This is problematic because it can drain your car’s battery, leaving you with an ineffective suspension, and a battery jump. The suspension issue could also be traced to a failing compressor, fuses, a failing pump itself, or other air suspension components like struts and springs. The most critical thing you can do is get your Mercedes the specialized care it needs.

Q: What can you do going forward to ensure your Mercedes’ performance?

A: If the problem is indeed AirMatic pump failure, then your Mercedes specialist will need to perform a series of diagnostic procedures to ensure that the correct parts are replaced. Usually when the AirMatic pump fails, it requires a replacement of the pump itself, associated fuses, and the relay as well. However, if the pump is failing due to another issue, such as a motor failure or compressor-related problem, then a different approach will be taken.

Q: How can Orion Automotive Services Help You?

A: At Orion Automotive Services, located in Ann Arbor, MI, we provide dealership alternative, specialized care for clients in the surrounding areas who drive European vehicles like BMW, Land Rover, Mercedes, Audi, and Subaru. We respect our clients’ investment in their automobiles, so it is our passion to provide affordable automotive care to our community. If you would like to learn more about your Mercedes’ AirMatic pump issues, or you’re experiencing symptoms of pump failure yourself, please contact us right away to speak to a helpful professional.

* Mercedes CLK image credit goes to: Enes Evren.

* Mercedes-Benz GLC Hybrid image credit goes to: y_carfan.

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