Have had my Tesla a few weeks now and absolutely love it. Only one disappointment - the car doesn't seem to have any blind spot detection capability that I can find. The Mercedes I traded really screamed at you if you hit the left turn signal for a lane change and there was a car next to your left rear fender. With my Tesla there appears to be no audible warning signal and just once I think I saw a brief flash of a visual warning image on the dashboard screen. Am I missing something here? Perhaps my car has a problem?