Getting the car to shut up requires reaching back inside and physically hitting the start/stop button to turn the car off. Hopping between makes and models can also make it easy to forget if a particular car has a start/stop button or not. The Hyundai Ioniq 5 pictured here has a circular start/stop button down by the media and climate controls. Photo by: Patrick GeorgeIn a gas car, a start/stop button has a very clear purpose. It’s not too much of a chore to hit a start button, or a stop button.