Turn the key on its side, and the buttons, internal hardware, and MB logo cause this river rock-like concept to bulge, giving it a slight potbelly. It was these two traits that I related to the ...

The glowing logo comes in white and doesn't light up continuously. Instead, it only activates at night, when you use the key fob to lock/unlock the doors, or when you open the trunk.

Now Mercedes-Benz support appears to be ready to launch. Car Key is an Apple feature that lets you use your iPhone and Apple Watch as an alternative to key fobs or physical keys.

If you want to use a digital key to drive your car, look for this logo. ... GM, BMW, Honda, Hyundai, and Mercedes-Benz, as well as phone makers like Apple, Samsung, and Xiaomi.