The other day as a car was turning right at a junction the right hand fog light came on,
then by magic it went off again, what is this wizardry with these cars.
BTW Volvo have had the automatic light thing for years.
I think the Volvo thing was due to Scandinavian laws and they just put it in all the cars regardless of the market.
The fog light coming on and going off was probably the daytime running light not a fog light, it's something I noticed a few years ago but have only got to the bottom of recently -
I 1st saw it on a Citroen and thought the lights were dodgy being a piece of French crap

but then saw it intermittently on other cars too but couldn't work it out.
From the Govt link I posted it appears that the permanent day time running lights are too bright to use at night causing dazzle and don't produce a beam of light to help illuminate the road so much like a fog light I guess but not actually a fog light.
The problem here is that if they are illuminated next to or near an indicator light then it means the indicator can't be clearly seen therefore they must flash on and off of go out when indicating

On a similar note I find it very hard to actually see indicator lights on modern cars, not sure if it's different bulbs such as LED's or the reflectors but they can be seen when head on to a vehicle but not very well when at an angle such as when a car is turning on a roundabout etc which is exactly when you need to see them

The worst ones are when the indicator is is the middle of the brake / tail light bulb cluster, looks stylish but fucking useless, dangerous IMO and i'm amazed they are legal