2004 Mercedes-Benz S500 4MATIC Problems
RepairPal has identified the most common problems with the 2004 Mercedes-Benz S500 4MATIC based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
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.
An engine oil leak may develop from the oil level sensor. Replacement of the leaking sensor will commonly correct this concern.
A door control module/actuator may fail. Our technicians recommend finding an expert to repair them. Taking the door trim panels off requires expert knowledge because they can break and the pieces are very expensive.
The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too low and cause damage to the undercarriage.
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern.