high end cars are much more difficult to work on. they have a lot more computer related issues. they also generally tend to have more features than your average chevrolet or volkswagen, so they have a higher number of things that could possilby end up going wrong with them.
All cars have systems that are specialized,not just high end
cars,it is because these cars are purchased by people that
have no concept of thrift and will pay what it takes with no care
of the costs,so the rates are raised up to this group that can
afford these kinds of cars and the techs benefit at the same time.