Have my new 18 and Im when I when I touch the mobile Apps icon, it comes up to "enable Mobile Apps" well It will not let me turn it on when I try to slide the toggle, and if I plug my Iphone in, it will turn that selection to grayed out where I cannot even select it! What Im I missing here??

 

Not 100% sure if this will work but did you disable apple or android CarPlay?

 

Well if my phone is hooked up I cannot even Select it at all--its greyed out! The only time I can select mobile apps is when my phone is disconnected

 

Go into the CarPlay settings and dis able the phone. But then connect it with your usb. It now connects but doesn’t automatically go to CarPlay.