Some more from the intro manual, which implies you can mechanically unlock the door with the key:

"The lock barrel (11) in the driver's door is used for mechanically unlocking or locking the
door. The footwell module (10) evaluates the movement (status of Hall sensors) of the
lock barrel....
Driver's Door Lock Barrel
The lock barrel is connected mechanically via a linkage to the door lock. Hall sensors for
the lock barrel are integrated in the door lock.
The footwell module evaluates the signals from the Hall sensors for locking/unlocking
purposes."


It sounds like the key will physically unlock the door, and the hall sensor is in addition to the mechanical linkage only to monitor the operation of the key for automation features.