Why did I sell Mercedes-Benz M-Klasse (W166)? Cons of used Mercedes ML GLE with mileage

More details about the pitfalls when buying Mercedes Benz ML GLE W166 of the third generation (2011-2018 years of release). Why and for what reasons they can sell or simply "get rid" of a used car called Mercedes-Benz M-Klasse (W166). We are talking about the problems and weaknesses of a used car.