Burmeister is much better, hence the cost.
You can select the type of routes used in sat nav.
Not sure about GLC but distronic on my GLE works well.
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.