you could possibly implement a rearview camera with some jbeam and lua trickery jsz's attempted one before and proved that it was possible
hmm, i can think of some rough ways they might be able to implement start-stop and parking sensors, the real question at this point is just "is it worth the effort?"
Start-stop system - https://www.beamng.com/threads/etk-auto-stop.57663/ Hybrid - https://www.beamng.com/resources/etk800-hybrid.6061/ I don't really see a need for sensors/camera when you can just switch to external camera and look behind the car.
nah you can just do it with the mirror texture and glowmaps no need for advanced lua it won't look so good tho