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: 69,991 (10,000–170,000)
5 model years affected: 2007, 2008, 2009, 2010, more2012
26 people reported this problem
19 people shared problem details
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.
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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.
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!
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
malfunction light comes on airpump not working
Same problem. Taking to dealer tomorrow
airmatic seem to have failed bsck is lowere
Hasn't been fixed yet. Looking for a way to fix this issue.
I have a 2008 CLS550 which I bought from the auction but for some reason, I took it the machine shop to crank the engine only to know that, the motor is not turning. According to the repairer, he tried to turn the motor mannually but unfornately it couldn't as so he assumed that, the engine is seized meaning the engine is damaged. My question what causes cls550 engine to seized and if the motor is not turning or running does that means the engine is damaged.
Same problem. No solution yet.
Shocks/Struts gone. Vehicle sitting low. Estimate from Mercedes dealer of $6,000.
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?
aie matic pump relay
car won't start after over night. car appears to be very low on front
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.
taking it to the car dealer
Noise when riding on bumby roads
my cars airmatic will noy start or air up my front suspintion.
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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