Someone already pointed out the key issue that MB fell from the top of the survey. The survey cannot be so badly flawed that MB falls from first to last if everyone else is pretty much in the same place. MB had to have a hand in that.
No one expects a Ferrari or Rolls Royce to be reliable. Certainly not anyone who's ever owned one. But just about everyone who owned an MB made up to 10 years ago can attest to the marque's reliability. Why should those folks expect or be expected to make more trips to the service department? You can argue that the MB badge on some of these later examples is false advertising. Before the Starmark program, few needed a Starmark program. It's sad to see folks have to pay for something MB used to give for free. Maybe next we'll see optional life insurance in place of sturctural integrity.