The living legend diesel Mercedes station wagon drift team Black Smoke Racing doesn't need to hit any switches to go into three wheel motion. They just dip a wheel into the dirt and they're good to go.
This is at the Norwegian hoonstravaganza Gatebil (which, in this instance, is in Sweden. No, I will never understand the Scandinavians) last month. I could watch that Merc double (or triple) smoke its way down a track all day.
Now That's What I Call Three Wheel Motion