Always unlock the car so that charging is stopped before the connection to the 230 VAC socket is unplugged. Note that the charging cable must be unplugged from the car's charging input socket before being unplugged from the 230 VAC socket, partly to avoid damage to the system and partly to avoid stopping the charging unintentionally.
Unlock the car with the remote control key - charging is finished and the charging cable's locked plug releases/is unlocked.
Unplug the cable from the car's charging input socket, refit the charging input socket's cover and close the hatch.
Unplug the cable from the 230 VAC socket.
Return the charging cable to the storage space under the cargo area floor.