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.
Resources for the Repair and Maintenance of your Mercedes-Benz E550 4MATIC
Mercedes-Benz E550 4MATIC Models:
Mercedes-Benz E550 4MATIC Problems
Squeaking/Worn Brake Pads May Require Rotor Replacement Also
Brakes --
Verified
Due to the size and material used on the brakes of these vehicles, the brakes may start to squeak around the 50 percent wear point. The brake rotor surfaces become uneven, causing a lip to form at the outer edge of the rotor. Because of this, the rotors are usually replaced when the pads are worn (pad life varies depending on driving style and terrain).
Failed Gateway Module May Cause Lack of Audio/Cell Phone Functionality
Electrical & Lights --
Verified
Lack of audio or cell phone functionality may be related to the failure of the audio gateway module.
ABS Modulator Failure Due to Dirty Brake Fluid
Brakes --
Verified
It is not uncommon to encounter premature failure of the anti-lock brake system (ABS) modulator assembly due to dirty brake fluid. Our technicians recommend flushing the brake fluid every two years in order to help prevent this problem.
The Differential May Develop Leaks From the Seals or Cover
Drive Train --
Verified
High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.
Mercedes-Benz E550 4MATIC Recalls (Recent)
Mercedes Benz Recalls 2010–2011 Vehicles Due to Power Steering Failure
Suspension & Steering, October 31, 2010
RepairPal Expert Overview:
Mercedes Benz is recalling 2010 C-Class, model 204; E-Class, model 212; and 2010–2011 E-Class Coupe/Cabriolet, model 207 vehicles due to a loss of power steering fluid that could result in power steering system failure. Owners may not have sufficient control of the vehicle in areas like parking lots, thus increasing the chance of a crash. Dealers will check and re-torque the connection fitting, free of charge.
Mercedes-Benz E550 4MATIC Model Years
Recent Mercedes-Benz Repair Estimates