When using Android Auto, is there any need at all to have access to the phone's screen? I am trying to decide where to put the phone - I am not very happy with it knocking about in the cupholder, but I don't want the faff of putting it in a mount if it isn't going to give me any benefit. Apart from anything else, I need to decide what length cable to buy. I just wish it could use the car's built-in Wi-Fi instead.