You get it figured out? I think you can do it on your steering wheel as well. When the screen setup display is set on the speedometer just hit the ok button on left side of steering wheel to go back and forth from mph to km/h. That should change it.
The only reason your not wanting it is due to glitches? I have had 3 vehicles 2017-2018 and yet all 3 haven't had one issue with the digital screens. Have you heard of several having problems?