general problems of the 2004 Mercedes Benz S500

Two problems related to electrical system have been reported for the 2004 Mercedes Benz S500. The most recently reported issues are listed below.

1 Electrical System problem

Failure Date: 04/14/2015

During rain storm, water seepeed ino air cowl into cabin-passenger side- flooded floor eventually sam electronic module under floor was damaged and shut off electronics in automobile while driving at high speed on freeway- with out power controls operating it made driving and stopping the car a very dangerous feat eventually went off road into guardrail and stopped. Mercedes benz has been aware (a lawsuit was filed in CA) of design defect of air cowl drain clogging and flooding cabin but has kept this dangerous flaw from owners even though we learned they have for sale an update kit to prevent this at owners expense. Our case fortunately did not cause a fatality but it could have easily had if the vehicle was not being driven by an expert driver- loosing power controls on a rain storm/ wet road with no power accesories / brakes is not a safe condition which needs to be addressed ASAP following this mishap we contacted local merceds dealership in plano,TX autohaus who responded being unaware and had no history of such problem- apparently mercedes is being wrongfully secretive of this serious flaw not only to consumers but their own people 9.

2 Electrical System problem

Failure Date: 01/29/2014

On may 16, 2014, I purchased a 2004 Mercedes Benz S500 with 61,649 miles from car credit nation. After a few weeks of driving the vehicle, and visiting with the Mercedes Benz dealership for routine inspections, we found further issues with this vehicle, that we felt were life threatening and hazardous to the road, other drivers, and our safety. Mercedes benz stated that the rotors and brakes were extremely bad on the vehicle, which they notice at the time of their inspection of the vehicle. We noticed that there were electrical issues with the vehicle, where the lights in the vehicle would not cutoff,the alarm system would continue to run after the vehicle was cut off and locked, the command center shutting off while operating the vehicle, and the srs and tire pressure light displaying on the dashboard center. Also while out one night at a family event, has we were leaving the event driving home we approached a traffic light to come to a complete stop and the car would not stop,the breaks were touching the floor and we stopped several feet through the light nearly crossing the intersection. This was life threatening and frightening for all passengers. On January 29, 2015 the vehicle stopped in the middle of traffic completely shutting off, causing a dangerous situation, which could have caused further damages to the vehicle, our safety and others. Fortunately we were within distance of the Mercedes Benz dealership who immediately assisted us. He stated that the cause for the shut off may be caused by electrical failures, such as the alarm system, and other electrical failures. The 2004 Mercedes Benz that we purchased on may 16, 2014 in our estimation is a total lemon and is not worth the money we have paid. Our vehicle has been in the repair facility for 30 days, before being repossessed.


Other Electrical System related problems of the 2004 Mercedes Benz S500



S500 Service Bulletins
S500 Defect Investigations