Nissan X-Trail e-POWER 2023 Owners Manual
5.8.2. Rear fog light
The rear fog light should be used only when visibility is seriously reduced [generally, to less than 100 m (328 ft)].
To turn the fog light on, turn the headlight switch to the 
position or turn the front fog lights (where fitted) on, then turn the fog light switch to the 
position.
To turn the fog light on with the headlight switch in the “AUTO” position, the headlights must be on, then turn the fog light switch to the position.
To turn off, turn the fog light switch to the OFF position.
Owners Manual