Sorry to hear that Mobydick, a good or bad salesman can make or break the experience. Good luck with whatever you do.
JP , good to hear something is actually happening, I would still guess MB UK have had some input into this but the dealership have been told not to tell you.
As you say odd regarding mileage of the 2 cars without issues, there must be something different in the way the cars are set up, as an engineer my logic would say not but the facts disprove that.
2017 GLC AMG43 premium plus, night pack, leather, intel lights, 360 camera, side steps. = sadly gone
Now GLE450 Premium plus, Selenite, Black/White Nappa leather, Tech plus pack, Driving assistance pack, Tow pack, Off road pack, 22 inch wheels.