Car Problem Reports

Mercedes-Benz CLS550 Airmatic Pump Motor May Fail Due to Sticking Relay

Mercedes-Benz CLS550 Problem
17 Reports
Me Too

Model Years Affected: 2007, 2008, 2009, 2010

Average Mileage: 58,177 mi (10,000 mi - 120,000 mi)


A sticking relay, causing the airmatic pump motor to constantly run, may causee the airmatic pump motor to fail or the battery to go dead when the car is shut off. Worn airmatic pump mount bushings can causes noises in the front axle while driving on bumpy roads or a buzzing noise.

  • Visitor, , 78,000 mi

    Turned the car off, pump motor continued operating for about 15 minutes. Made a loud buzzing sound and then an intermittent buzzing sound. Just happened last night so haven't had a solution yet.

    Flag This
  • Visitor, , 87,700 mi

    My car is visibly "crooked". The left side appears to be the normal height, but the right side is very low. I have no warning lights or error messages. It states "vehicle rising" so when I go to drive it I think it's lifting but not all the way. When parked the right side is 3-6" lower than the left.

    Flag This
  • Visitor, , 58,000 mi

    ride height fine - eveb a bit high but compressor runs anyway even after shut off - I am replacing the entire system with manual springs and struts - screw them - its cheaper than constant repairs

    Flag This
  • Visitor, , 56,000 mi

    malfunction light comes on airpump not working

    Flag This
  • Visitor, , 52,310 mi

    Same problem. Taking to dealer tomorrow

    Flag This
  •  Rookie

    airmatic seem to have failed bsck is lowere

    Flag This
  • Visitor, , 43,000 mi

    Hasn't been fixed yet. Looking for a way to fix this issue.

    Flag This
  • Visitor, , 120,000 mi

    Noise when riding on bumby roads

    Flag This
  • Visitor, , 60,000 mi

    I am having the same problem as reported. The driver side of my car is slammed while the passenger side appears fine. I noticed when I shut the car off to get gas that the front drivers side wheel area was still making noise. Took the relay out for time being until I can get into Mercedes. Hope its not too costly but I'm sure it will be!

    Flag This
  • Visitor, , 10,000 mi

    my cars airmatic will noy start or air up my front suspintion.

    Flag This
+ See more reports
Ask a Question