Mercedes E Klasse Diesel Air Suspension Problem

That sounds familiar. I had similar ride height problems with my older Audi A6. It turned out to be a small air leak in the system. Was the bellows valve the only error code you received?

Yes, the diagnostic tool specifically flagged the bellows valve. Did your Audi throw the same error, or did it point to something else initially?

My Audi didn't specifically say bellows valve, but it did flag a general suspension issue and an air leak. Given your error code and symptoms, a defective bellows valve seems likely. I'd suggest getting it checked at a workshop. It could be more complex than just the valve itself.

Thanks for sharing your experience. I took it to the shop, and you were right. It was indeed the bellows valve. The repair cost me 590€. I appreciate the input.