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

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.

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Average mileage: 69,033 (10,000–170,000)
6 model years affected: 2007, 2008, 2009, 2010, more2011, 2012
31 people reported this problem
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Viewing 1 - 20 of 23 problem details
2008 Mercedes-Benz CLS550 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.
2008 Mercedes-Benz CLS550 88,300 mi,
Car has bottomed out and will not rise. I have changed the relay and air compressor, check all three Airmatic fuses (37, 39, & 41) and still doesn't rise. Any thoughts?
2007 Mercedes-Benz CLS550 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.
2007 Mercedes-Benz CLS550 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!
2008 Mercedes-Benz CLS550 56,000 mi,
malfunction light comes on airpump not working
2009 Mercedes-Benz CLS550 76,000 mi,
The car makes a sound like air is coming from the right tire and will not lift
2007 Mercedes-Benz CLS550 125,000 mi,
airmatic and esp malfunction light
2007 Mercedes-Benz CLS550 43,000 mi,
Hasn't been fixed yet. Looking for a way to fix this issue.
2007 Mercedes-Benz CLS550 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
airmatic seem to have failed bsck is lowere
2009 Mercedes-Benz CLS550 54,000 mi,
Shocks/Struts gone. Vehicle sitting low. Estimate from Mercedes dealer of $6,000.
2009 Mercedes-Benz CLS550 68,885 mi,
Airmatic Malfunctions Suspension doesn't rise.
2012 Mercedes-Benz CLS550 60,000 mi,
I woke up the other day only to find my CLS550 4matic's back rear very low to the ground. I've had the car now for approx 30 months. I took it to the Mercedes Benz dealer and got the dreaded news. The rear air suspension system failed. Needs a new compressor and struts approx. $3800 in repairs. I purchased the car with 10k miles on it but it was sold as new because it had never been titled. The dealership contacted MB who agreed to eat the cost for the part (appox $2600). I still have to pay for the labor. This car will be traded as soon as the repairs have been completed.
2010 Mercedes-Benz CLS550 52,310 mi,
Same problem. Taking to dealer tomorrow
Car will not raise. Air pump may not be working or relay for air pump may not be working
Parked the car and went out of town. Was working fine. When i came back i started it and it said vehicle rising on dash board but the front driver side (Left) was not rising. I could hear the compressor kicking in but wasn't rising. I tried driving forward a few feet and the Red message came on Stop car too low. So i parked it back and now both the front and the back side is bottomed out on its suspension and wont raise.
2007 Mercedes-Benz CLS550 65,000 mi,
Left side won't come up stuck
2007 Mercedes-Benz CLS550 170,000 mi,
aie matic pump relay
2007 Mercedes-Benz CLS550 84,000 mi,
car won't start after over night. car appears to be very low on front
2010 Mercedes-Benz CLS550 70,205 mi,
taking it to the car dealer