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.
Airmatic Pump Motor May Fail Due to Sticking Relay on Mercedes-Benz CLS550
Average mileage: 67,516 (10,000–170,000)
23 people reported this problem
17 people shared problem details
2008 Mercedes-Benz CLS55087,700Visitor
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.
2007 Mercedes-Benz CLS55078,000Visitor
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 CLS55060,000Visitor
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!
2007 Mercedes-Benz CLS55058,000Visitor
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
2008 Mercedes-Benz CLS55056,000Visitor
malfunction light comes on airpump not working
2010 Mercedes-Benz CLS55052,310Visitor
Same problem. Taking to dealer tomorrow
2007 Mercedes-Benz CLS55043,000Visitor
Hasn't been fixed yet. Looking for a way to fix this issue.
2009 Mercedes-Benz CLS55054,000Visitor
Shocks/Struts gone. Vehicle sitting low. Estimate from Mercedes dealer of $6,000.
2008 Mercedes-Benz CLS55088,300Visitor
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 CLS550170,000Visitor
aie matic pump relay
2007 Mercedes-Benz CLS55084,000Visitor
car won't start after over night. car appears to be very low on front
2012 Mercedes-Benz CLS55060,000Visitor
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 CLS55070,205Visitor
taking it to the car dealer
2007 Mercedes-Benz CLS550120,000Visitor
Noise when riding on bumby roads
2008 Mercedes-Benz CLS55010,000Visitor
my cars airmatic will noy start or air up my front suspintion.
2007 Mercedes-Benz CLS55047,300Visitor
my car currently in shop for malfunction to the airmatic system... not sure exactly what's wrong yet. my paddle shifters failed at 36k miles. I love the car but i don't think i'll buy another MB. These cars are very nice but not very reliable and for the 80k that my cls costed, i think it's crazy. I'm going to try my luck with a lexus i do believe they are much more reliable and less maintence
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