Black Ice! I find its helpful, some don't like it though.
Your driving a German car. Germans build the speeds driven on the autobahns. Our wipers work at speeds over 100 mph and you can drive the car in bad weather. AND it rains a lot in German, even in the winter time. So... its helpful to know when the roads can freeze. Most Americans just don't get this feature though. BMW's have had this gong for a long, long time. At least since the e30 days.
