My parents just bought a 2021 Premier. The salesman said it has start/stop. I does not actually do it. I have been all over google. It seems the 2021 should also have a button on the dash next to the flashers to disable the start/stop. This vehicle doesn't have that button. Is there something wrong that the start/stop doesn't work. It's not cold/hot here. Just upper 70's. AC / heat were not on high. My mom is a bit of a nervous driver and I'm worried if it does suddenly start/stop she might freak out. I don't assume there's a chance this vehicle does not have it? It seems 2018+ has it?