I've got  a Mk3 Fabia and the centre display and dashboard light levels flicker when it's dusk. It's fine in daylight and full darkness. So I guess there's a light sensor somewhere.

Edit: I phoned my local Skoda dealer and the master tech said the sensor is part of the main instrument display and the display can flicker in variable light levels. Does anyone else have this happening? The light levels go up and down a bit, a bit like a faulty alternator in the cars of yore.

Only thing I can think of is to try dusting or cleaning/polishing the plastic dash cover with a microfibre cloth if there's a sensor supposed to be there.

 

Or does it relate to the auto main beam sensor on the rear (front-facing) of the interior rear view mirror, I'd also try cleaning this and inside and out of that area of the windscreen.

 

These "smart" systems on the car can be fooled by a bit of debris on or near (such as a leaf near or on the front "assist").

 

If you have the wheel switch that adjust the brightness of the dash you could try adjusting the brightness slightly to see if that helps the automatic system.

 

I've no idea how effective the above would be but all are cheap, easy and quick to try.

 

Cleaning didn't help with my neighbour's 2023 Ren-No! Nissan Cashcow's "automatic" rain-sensing windscreen wipers, the system remained as useless as it had always been requiring the intervention of what used to be the driver (rather than part-time passenger) behind the steering wheel, so much for progress, of course VW computer programs have German engineering so are "clever". 😁

 

HTH.