In the U.S. the automotive legal system is heavily weighted towards the consumer meaning that Mercedes would get whacked with a great big fine if they don't sort it.
It's probably the earthing wire on the tailight assembly problem . Evidently its a "corrosion issue" although this Aussie [ good on ya mate] reckons its the gauge of the earth wire/size of fixing used. Anyway here is the DIY fix should you want to either fix it or simply inspect it for the overheating issue .
[YOUTUBE HD]yBeKlptAnHM[/YOUTUBE HD]
Because we are a tiny, insignificant island (in the eyes of the world) with tiny market share?
Or, ze Germans haven't gotten over losing to us?
Or, they conveniently forget that we are one big, happy European family?