You can just turn off or disable the internet connection from the car (take out the circuit breaker for the modem). It turns out the things on even my 8 year old tesla were really useful. I liked streaming music for free, voice recognition, maps with up to date traffic. But the car would still work great without an internet connection. Some people are driven crazy by not enough touch screen buttons, it's never bothered me.

But you can just turn off all internet connections and go on your way.