I now have 3100 miles on my Q50. Still waiting for the software updates so I can use all the features I thought I paid for? I have the steer by wire option and I'm not sure if it's working properly or at all? At first, I thought it was just very subtle adjustments, but I keep it set on "Quick" and I may be fooling myself. If I take my hand off the steering wheel at 70 mph on a straight Interstate with bright painted lines, why does my car always drift out of the lane within 500 feet? I welcome any input from other owners with the SBW. Many thanks.