Brake Light problems of the 2010 Mercedes Benz ML350

Brake lights & rear tail gate malfunction after running car through car wash. The problems self-correct after a couple of days. Suspect that water is somehow getting in via faulty seals. There are multiple complaints about similar issues and mbenz has even issued recalls for other models. In one recall, the problem is noted to potentially cause a fire. Although dealer is aware of this problem, the boerne, TX service rep has no interest in investigating the matter further unless, knowing others have similar issues, unless I pay for the service. Hope we don't earn a ticket or cause an accident.

Purchased car used in February 2015, had to replace right brake light bulb three times within three months. Dealership had to replace the wire harness on both taillights as the contacts on the brake light sockets (both sides) were defective. The c230 model had been recalled for this very problem, however, the Ml350 was not included in the recall. I would advise the NHTSA to see if other models of the mercedes have been having this problem to avoid rear end accidents when brakes fail. The car is only five years old, and has not been in an area that should cause erosion of failure of both wiring harnesses.

The right brake light sensor gave a warning that the brake lamp needs replacing. While making arrangements to replace, the left brake light began to malfunction and also needed replacement. Since both led brake lights failed within 3 months it seems to be a systemic problem with Mercedes Benz led lights. I reported the problem to Mercedes Benz USA and was told the vehicle is out of warranty but they would call the local dealer on my behalf and speak with the manager to see if there was anything that could be done. We replaced both rear light assemblies at a cost of $832. 44 at the dealership in danbury. Mb of danbury reduced the labor charge by a small percentage. I have zero confidence that this will not happen again during the life of the vehicle.