Yes ditch, if it works will only take 30 minutes, sometimes it stops and they have to restart it. Takes about 20 minutes for me to do it on my GLE, that's if I do all the countries, if I just do UK and Ireland is under 10 minutes.
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.