Unlocking the driver's door (mechanical key)

If the vehicle can no longer be unlocked with the SmartKey, use the mechanical key.

If you use the mechanical key to unlock and open the driver's door, the anti-theft alarm system will be triggered.

•► Take the mechanical key out of the SmartKey.

•► Insert the mechanical key into the lock of the driver's door as far as it will go.

•► Turn the mechanical key counterclockwise

•► Turn the mechanical key counterclockwise to position 1.
The door is unlocked.
•► Turn the mechanical key back and remove it.
•► Insert the mechanical key into the SmartKey.

    See also:

    Safety systems
    Problem Possible causes/consequences and Solutions (USA only) (Canada only) The red brake system warning lamp comes on while the engine is running. A warning to ...

    Important safety notes
    Do not leave the SmartKey in the trunk. You could otherwise lock yourself out. WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always take the SmartKey w ...

    Notes on care
    Regular care of your vehicle is a condition for retaining the quality in the long term. Use care products and cleaning agents recommended and approved by Mercedes- Benz. WARNING Many cleani ...