This happened to me and others also with a recent software update. Press and hold gives only display choices, not button function choices.
When I use the right scroll wheel it gives an error that the phone isn't connected. I never connect a phone, so whatever it's supposed to do now is of no use for me.
Having to fiddle with the display to change the fan speed is dangerous. I have to look down to hit the right button, and keep looking to stay on it. Bad idea! I prefer to look at the road ahead. Keeps me from banging into things.
I want my fan speed control back!
Maybe Tesla will change this back or better give us a choice.