to come on sooner - I drive thru' 2 tunnels a day - seems like if I'm doing the speed limit, the headlamps just manage to come on as I'm exiting the tunnel - is this a programmable feature of c-Best?

 

The sensitivity is programmable through c-best, though I doubt it would help you in tunnels. I think the issue is that turning HID lights on and off too frequently is bad for their longevity, so the automatic system was designed so that it won't keep turning the lights on and off as you pass in and out of the shadows of buildings and trees at dusk.

You could always just turn them on manually.

 

i didn't find the auto setting to be the greatest either so i don't use it, instead manually. seems to me this setting is most useful when you drive moderate to long drives where the daylight changes gradually (dawn or dusk) and you might forget your lights on or off so you put them on auto.