The car comes with two main keys, a secondary key and a blade key.
The main key with a rectangular head fits all locks in the car.
The auxiliary key with a rounded head only fits the door locks, ignition switch and fuel tank lock.
A flat key fits all locks. It is recommended to always have a flat key with you, just in case.
Spare key
Mercedes-Benz car keys are made using a special system, so if the keys are lost, it will take a long time to obtain new keys.