Mercedes-Benz E-Class: Unlocking the driver's door 
(mechanical key) - Doors - Opening/closing - Mercedes-Benz E-Class Owners ManualMercedes-Benz E-Class: 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.

    Automatic locking feature
    The vehicle locks automatically when the ignition is switched on and the wheels of the vehicle are turning at a speed of more than 9 mph (15 km/h). You could therefore be locked out when: - ...

    Locking the vehicle (mechanical key)
    If the vehicle can no longer be locked with the SmartKey, use the mechanical key. •► Open the driver's door.•► Close the front-passenger door, the rear doors and the trunk lid/tai ...

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