The best solution is Wired. Always.
Bluetooth isn't as secure as people hope. Signals get confused, crossed, comformation codes get echoed. My girlfriend has found her Bluetooth connected to other phones in a crowd, and once had someone's bluetooth conect to her phone mid call.
But the strangest story may be mine. while driving along on the highway, My radio music was interupted by "Hello?..... " I didn't even own a cell at that point, but my hands free feature on the radio had sync'd up to someone's bluetooth as they made a call, we had a nice 3 way conversation for about 60 seconds. I never did figure out which car near me it came from.
You don't want that sort of thing happening to a throttle. It might decide to take off, or not stop, or not go when that bus is about to hit you and you realy need to go now.