The relay which turns the airmatic suspension pump on may fail causing the pump to run continuously. This can result in failure of the pump motor or a dead battery as the pump motor will continue to run after the car is turned off. Also, Worn airmatic pump mount bushings can causes noises in the front axle while driving on bumpy roads or a buzzing noise while the pump is running.
Airmatic Pump Motor May Fail Due to Sticking Relay on Mercedes-Benz E550 4MATIC
Average mileage: 73,621 (38,000–121,000)
12 people reported this problem
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dash signal says suspension malfunction and the car height will not go up.
Car height will not go up, dash signal says; stop! car too low
Often after the car has been sitting for a few hours on one side or the height on 1-3 sides are very high as if I selected the vehicle rise button..mind u this is the case prior to me even stepping foot into the vehicle. Also I constantly get the Malfunction indication warning to include a message which tells me to pull over, the vehicle is too low. I hear hard clicking noises when I ride over any rough road areas. I continuously hear the air pumps engaging. I can not quickly pull off after starting the car because usually one side is sitting close to the ground.
I started getting "Malfunction" notices then after awhile I noticed car was raised all the time. Now I am getting "Car to low STop!" messages which I believe that a fuse was blown or relay bad. Hopefully not the compressor.