Just got my M3 12k service and noticed the navigation setting I had got reset.
My guess they did an update. Now I see this new (or i just didn't notice) addition to the navi options, "Traffic conditions/
Gray Map".
Screen used to be multicolored streets. It was hard to distinguish which is the street, your route or the traffic condition.
This selection made the map easier on the eyes with less clutter and you can easily see the traffic conditions of the streets.