2012 Mercedes-Benz CLS550 Problem Reports

RepairPal Verified 2012 Mercedes-Benz CLS550 Problem Reports

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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.