Phone customer services and they will tell you what the latest version for your car is. Go into sat nav settings and you will find what is installed in your car.
I got my GLE last June and have done 2 nav updates since, mbux is obviously different here not tom tom but my old glc was updated at the service every year.
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.