I don't usually comment on stuff like this but this has got to be a joke. As others have mentioned, Benz & Lexus has been doing this for a while now. I don't even think Benz does it any more. I had a client back in the early 2000s with a 2003 and a 2005 SL55. It came with this thin card that you could keep in your pocket at all times to both enter the vehicle and to start the vehicle. It worked just like the keyfob did. Didn't have to be pulled out of your pocket or placed in a specific place.
This is literally 90s technology if you have to tap it on the door handle to open the car!
