You can open the doors of the Mercedes E-Class (W212) if the battery in the keyhole is discharged by using an emergency key inside the breach key. To get the key, you must release and pull the slider that locks the key in the log. The key in the lock-lock of the door must be turned counterclockwise to open the lock. In the same way, a lock of the boot opens. You can also close the lock of the driver's door with the emergency key.
