I love my Tesla so far but there are always room for improvement. This one seems to be like a great and safe feature but it is not there. On my monitor, I can see the cars on the side, on the front but not on the back. It would be great if I could see the car on the back of me especially next to my line. Currently I can see them when it is already to late to merge to the other line. Anyone knows why this is not a feature?