The advantage of push button start for vehicles is it allows for a remote start for car owners, which can be a great way to warm up the car while it's still locked and parked in one's driveway.
The technology will also detect if the key is inside the car which makes it almost impossible to lock your keys inside your car.
Some Keyless cars do turn off automatically after you leave the car on for 30 minutes and walk away with the key fob.
Ford Keyless cars do usually turn off automatically with the new feature however older keyless cars may not have the feature and may continue to run.
A Keyless car requires the keyfob to be in your pocket or near the vehicle and then you can press the start button for the vehicle to start.
Without that keyfob though the vehicle will not start when you push the button.
Ford's keyless vehicles now have a feature that automatically turns off the engine after 30 minutes of idling if the key fob is not in the vehicle, the company said recently.
But many older vehicles have not been retrofitted to reduce the hazard, despite the modest expense of doing so.
The ignition system of a keyless car system works only once the key code of the key matches and that works only in a certain range.
When that kefob is not near the car then the car will not start or the car will shut off.