The guidance light illuminates the area surrounding your car to help you see in low light. You can enable it and select a time duration via the centre display. The guidance light automatically activates when your car is locked and deactivates after the selected time period.
Press the car symbol
in the bottom bar and go to Settings.

Go to .
Turn it on or off, or set your desired time duration.
The guidance light stays enabled between drives. You can disable it via the display.