What to Do When the Mercedes Key Won't Turn?

[StJasmine]

Depress the brake pedal, hold the steering wheel with your left hand, gently shake it, and simultaneously shake and turn the key with your right hand to unlock. For push-button start models, the unlocking method without the key is roughly the same as with the key, except for the step of inserting the key. Depress the brake pedal, then turn the steering wheel left and right, and finally press the start button to start the car. The reason for the steering wheel lock is that the rotation of the key controls a steel pin via a spring. Once the key is removed, the steering wheel locks if it is turned.