What are the two styles of Mercedes-Benz keys?

[VanJulian]

All Mercedes-Benz cars have the same key. The two styles likely refer to the mechanical key and the remote key. Key classification: Car keys are divided into two types, one without an anti-theft chip and the other with an anti-theft chip. Keys with anti-theft chips are commonly found in some low-end models and don't even have a remote control, which is now rare. Smart key: A smart key is equivalent to a small radio wave transmitter. The chip inside the key contains a unique ID code that matches the car. When the smart key emits a radio wave, it is received by the car. After confirmation by the car's anti-theft system control unit, the key is recognized, and then the door can be opened and the engine started.