Can the $5k enhanced auto pilot function be added at a later date like the full self driving capability? Or if you want your car to have full self driving when that is eventually released, do you need to buy the enhanced auto pilot function NOW? Also, can anyone speak to the cost of repair for the model 3? Is it generally more expensive to repair a Tesla? Not that I plan on getting in an accident, but if I did, can I expect to be charged more with the repair company or insurance premiums? Thanks!