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.

Firmly turn the mechanical key counterclockwise as far as it will go to position 1 and hold it in this position.
Pull the door handle quickly.
The locking knob pops up.
The door is unlocked.
Turn the mechanical key back and remove it.
Pull the door handle again.
Insert the mechanical key into the SmartKey.