Mazda CX-30 2020 Owner's Manual page 204

When Driving
Switches and Controls
Auto-light control
When the headlight switch is in a position other than
switched ON, the light sensor senses the surrounding lightness or darkness and
automatically turns the headlights and other exterior lights on or off.
CAUTION
Do not shade the light sensor by adhering a sticker or a label on the windscreen.
Otherwise the light sensor will not operate correctly.
The light sensor also works as a rain sensor for the auto-wiper control. Keep hands
and scrapers clear of the windscreen when the wiper lever is in the AUTO position
and the ignition is switched ON as fingers could be pinched or the wipers and
wiper blades could be damaged when the wipers activate automatically. If you are
going to clean the windscreen, be sure the wipers are turned off completely when
it is particularly tempting to leave the engine running. This is particularly important
when clearing ice and snow.
NOTE
The headlights and other exterior lights may not turn off immediately even if the

surrounding area becomes well-lit because the light sensor determines that it is
night time if the surrounding area is continuously dark for several minutes such as
inside long tunnels, traffic jams inside tunnels, or in indoor parking lots.
The sensitivity of the auto-light control may be changed.

Refer to the Settings section in the Mazda Connect Owner's Manual.
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*Some models.
*
and the ignition is