This is a coincidence. I was about to ask a similar question. I've always had this feature on, but never noticed what was going on during the day. It's worked fine at dusk/night. But these last months, with clear blue sky everyday, I noticed my lights were on. I eventually took it to the dealer, and under warranty, they replaced the sensor. That was last week. But I notice no change in behaviour. What I have noticed is that it does work (switch off)in certain daylight situations - and that is when the sky has cloud cover
used: . Not sparse cloud, but a good 50%+ cover. When it clears, bam, the lights come ON again.
So in summary.
Lights ON - dusk, dark; and bright sun conditions.
Lights OFF - daylight with cloud.
Does this formula make sense......?? Or is the setup/sensor faulty.