Nissan X-Trail e-POWER 2023 Owners Manual
6.2.1. Super Lock system (where fitted)
For Super Lock system equipped models, failure to follow the precautions below may lead to hazardous situations. Make sure the Super Lock system activation is always safely conducted.
When the vehicle is occupied, never lock the doors with the Intelligent Key. Doing so will trap the occupants, since the Super Lock system prevents the doors from being opened from the inside of the vehicle.
Only operate the Intelligent Key lock button when there is a clear view of the vehicle. This is to prevent anybody from being trapped inside the vehicle through the Super Lock system activation.
Locking the doors with the Intelligent Key or the lock sensor (on the front door - where fitted) will lock all doors including the back door and activate the Super Lock system.
To activate the Super Lock system, double-press the LOCK 
button on the Intelligent Key or lock the doors by double-pressing the lock sensor. Hazard indicator lights flash longer to indicate Super Lock activation.
This means that none of the doors can be opened from the inside in order to prevent theft.
The system will be released when the door is unlocked with the Intelligent Key or the capacitive unlock sensor (on the front door handles - where fitted).
The Super Lock system will not activate when the doors are locked with the power door lock switch.