Unequivocally it is a better car because it actually is, as the maker claims "engineered like no other car in the world".
If you don't understand this look at any part that came off a Mercedes then look at the equivalent part from some other car, even a car costing a lot more. See the difference?
There are a few other things about these cars and in this section you'll find such things as Mercedes Benz firsts in in automotive history, why diesels are so cool (they really are) and a few other things about a certain models of Mercedes Benz cars.