Alright, I got into Engineering Mode/Dev Mode. There are endless menus to sift through
System Settings>System Info: TAP 10 times quickly, where the vertical line hits the bottom of the screen and then tap once on the lower far right of the screen.
You need to be careful, it's not a forgiving system. It's very "engineer" like and is not user friendly. Tap once, and wait...you do not want to tap and then tap again, it might load the screen and you change something. This Dev mode is hard to navigate and seems like a few booby traps are in the system, there is no simply reset here. Surf with great care
There are some menus that do not have back buttons, so you have to press the little reset button to reset the AVN.
There are a few locked menus, however I believe there is another way to get into those. Camera settings, radio and a few other things you can change. I have not changed anything, simply since I don't know what the outcome will be. There's alot of Korean language (see below). The most interesting menu is "Vehicle Settings" which is locked, won't load. I'm not sure if that menu is locked permanently, or you need the KIA computer hooked up to the vehicle. I will continue to poke around. I'm betting that is where the drive modes, and other dynamic settings are located.
Download Google Translate so you can read some of the menu items...I'm not going to "root" mine, I don't need YouTube or games on it. I am more curious about adding/adjusting things in the vehicle.