I was driving my grandpa's '13 535i x-drive, and the x-drive is a very important detail, because it has hydraulic steering. Being a recent BMW, it also has turns off the engine when you stop. I was turning left on a divided highway, in the turn lane, and I stopped in the turnoff, then went to turn the wheels. The engine had shut down, and with it the steering did too. I had to let off the brake to restart the engine so I COULD TURN THE DAMN WHEEL, there was no sensor on the wheel! Thankfully BMW kindly provides a defeat button, which will be the first thing I press when I drive that car again.