You need to put pressure on the brake pedal and hold the pressure, while you press the button once. So to start the car hold the brake pedal down, push the start/stop button. To turn off the car, hold pressure on the brake pedal, make sure the car is in PARK, then push the start/stop button. If that does not work, then you have an issue with the car. I admit, I got confused by this when I first got the car. Forget the manual for now search for the U-Tube Video's, there are dealerships who made some really good video's search google for "2022 Tucson SEL video"Hi, I have owned my Tucson '22 SEL for 3 weeks and sat in it nightly with the manuals to learn it however I am still confused about how to turn engine on & off. Foot always on break pedal or not? Push button once or twice, three times? Sometimes the break pedal feels really stiff & I have to press hard, other times it feels looser. I have started it both ways and I see it goes through an accessory mode with one press of the button but also sometimes that one press starts it.