Car Problem Reports

Mercedes-Benz E550 4MATIC Airmatic Pump Motors May Fail Due to Sticking Relays

Mercedes-Benz E550 4MATIC Problem
9 Reports
Me Too

Model Years Affected: 2007, 2008, 2009, 2010

Average Mileage: 58,270 mi (38,000 mi - 85,000 mi)


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.

  • Visitor, , 38,000 mi

    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.

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  • Visitor, , 51,000 mi

    dash signal says suspension malfunction and the car height will not go up.

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