Try flip it away from "Auto" and back?
Did you cover the sensor? It's at the middle of dashboard facing windshield toward the edge.
Else, time to visit SC.

Then u better go sc check. Mine is ok only. In and out tunnel will auto on-off. Only issue is my light turn on 6pm bcoz of tinting, it detects the sky darker. Hehe.

Wei , edge u mean the bottom end of windscreen right? Upper edge(where gps is) is also edge...

This car just launched less than 1/2 year. Nobody know how reliable for sure.

I never face any problem so far (got my HE since May) except the door rubbers making annoying sound which can be easily settled.

As 666devil mentioned, engine sound rough at 1500rpm. The gear change is so smooth, You gotta give credit to Hyundai as this is their own 6AT gearbox.

If your budget allowed, just get the 1.8. The leather seat of 1.6 is a bit hard. Oh ya, if you have extra budget, change the tyres once you get the car, coz the only sound u will hear inside the car is that annoying tyre sound.

The ori speakers sounds bassy n nice but don't have the crisp , maybe adding tweeter will be great. I've change the front to component and back to coaxial and it sounded very clear but no bass in the end have to add a underseat woofer and now I'm quite happy with the sound just my 2cent as I'm not into super high end sets . I don't have any issue with the 1.8 Hu just that the gps laggy..