Glad you got it sorted Miny, most dealers "act daft" until you threaten to walk away.
Never took the wheel cover out and the tyres on my car 19 and 20 inch do provide some protection.
Enjoy your car.
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.