I was being sort of facetious, but the button on the far right, hill assist? Not sure what it's purpose is, you turn it on, I don't notice anything besides a green symbol and when you go over 5mph it will say ''for ___ to work reduce speed below 5mph" So far, nothing has allowed me to go 200 mph or turn off DRL or stop 'service trailer brake' from dinging 20 minutes of my 50 minute commute.