I have an ex demo like you bought Oct 07. No Sat nav, but have to say that the auto lights and wipers have been brill and a real plus on the higher spec alfa .
I travel through a tunnel on the commute to work each day. It always takes about 300yds to shut off steping down through side lights which took a while to get used to. I guess this is not just an issue of adjusting the sensitivity through the setup??
Hope you get things sorted. Welcome:xmas: