Air suspension issue hear the compressor running?

Tiny
BHAMDOC1
  • MEMBER
  • 2008 MERCEDES BENZ E63 AMG
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
When it sits overnight the rear sinks, more on the driver side. Once you start the car it will start rising to a close to 100% level. I could hear the compressor running, and some hissing from rear driver side, then after a while all stops and its leveled. Then when I turn it off you could slowly see the driver rear sinking and a hiss. Do you know what usually goes wrong with these?
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Friday, January 9th, 2026 AT 9:53 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,475 POSTS
The hiss is the clue, the system leaking, you need to find the source of the noise which is probably the level ride shocks. You can use a bottle of soapy water to help you, spray it near the noise and look for bubbles to confirm the source. Please upload an image or a short video in your response, so I can see what's going on.
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Saturday, January 10th, 2026 AT 9:35 AM

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