Will Model 3 be fully drive-by-wire including steering, brakes and accelerator? It makes sense that any vehicle that's ready for L4 Autonomous driving could also be fully drive by wire because any safety or redundancy arguments for mechanical linkages are moot if it's trusted and designed to be completely driverless anyway. Drive by wire would be a major step in design for manufacturability. First it means that there's no need for separate production of right and left drive versions (which matters a lot for vehicles built for a global market). There would just be data ports and sockets for the steering wheel and pedals on both sides and probably a port to plug in a heads up display on either side. The vehicle could be configured by a technician shortly before delivery and changed easily afterward. Right, Left or none would be equally simple choices (I suppose you could also put in dual steering wheels and controls but don't know any reason). Model 3's radical interior with no driver's side instrument cluster, just the big center touch screen suggests this approach. Adding a heads up display would completely replace it when used in traditional driver mode. Otherwise, unplug the steering wheel and pedals and you have a level 4-5 autonomous vehicle interior. Not having to build separate right and left versions is a big manufacturing savings. Parts count goes way down and scheduling gets simpler. Not needing any driver instrument cluster drops parts count and labor further. Heads up displays can be optimized or customized in software and plugged in as needed just like a steering wheel.