Airmatic lowers when cold/parked down slope
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Newbie
Joined: Oct 2024
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Airmatic lowers when cold/parked down slope
Hello!
I own a 2005 S211 om646, the back suspension is airmatic. I went to a service with a specific Mercedes tester, and only a level sensor was faulty. We changed the sensor. Before the sensor it lowered every night. After sensor change it only lowers when its cold or rarely when its parked down slope. When I turn the engine on it raises quickly and have no problems afterwards. Could it be the air bags? Thank you all very much.
I own a 2005 S211 om646, the back suspension is airmatic. I went to a service with a specific Mercedes tester, and only a level sensor was faulty. We changed the sensor. Before the sensor it lowered every night. After sensor change it only lowers when its cold or rarely when its parked down slope. When I turn the engine on it raises quickly and have no problems afterwards. Could it be the air bags? Thank you all very much.
Member
Joined: Jun 2024
Posts: 191
Likes: 58
E320
Even after replacing the level sensor, if the suspension lowers overnight or under specific conditions, the air springs (air bags) themselves might have small leaks. These leaks can become more evident in cold weather due to the contraction of materials, or when parked on a slope, which might stress certain components differently. Additionally, the air lines or connections could have minor leaks or the valve block might not be sealing properly, allowing air to escape when the car is off. To further diagnose the issue, I recommend checking the fault codes from the Airmatic Control Unit. These modules can provide detailed information about any persistent or intermittent issues with the suspension system. Using a full system scanner like the youcanic will give you access to all relevant systems and potential error codes. If you're relying on a basic OBD2 scanner like the Bafx Products 34t5, it might not detect these specific suspension-related issues. Have you inspected the air springs and connections for any visible signs of wear or damage that might indicate a slow leak?
Thread Starter
Newbie
Joined: Oct 2024
Posts: 2
Likes: 0
Even after replacing the level sensor, if the suspension lowers overnight or under specific conditions, the air springs (air bags) themselves might have small leaks. These leaks can become more evident in cold weather due to the contraction of materials, or when parked on a slope, which might stress certain components differently. Additionally, the air lines or connections could have minor leaks or the valve block might not be sealing properly, allowing air to escape when the car is off. To further diagnose the issue, I recommend checking the fault codes from the Airmatic Control Unit. These modules can provide detailed information about any persistent or intermittent issues with the suspension system. Using a full system scanner like the youcanic will give you access to all relevant systems and potential error codes. If you're relying on a basic OBD2 scanner like the Bafx Products 34t5, it might not detect these specific suspension-related issues. Have you inspected the air springs and connections for any visible signs of wear or damage that might indicate a slow leak?
