Level 5
A level 5 allegedly autonomous vehicle will still not be anywhere near the complexity and potential of a level 1 human, while I think that much of the sensory functions that are being developed for autonomous vehicles may be useful additions to a piloted vehicle I don't believe a truly autonomous car is anything like as close as the marketing wonks and other fans would have us believe.
How much of the electronic kit we use daily, has failures, glitches of one kind or another, or the software suddenly develops gremlins?
Most of these items that develop faults, we can belt with a hammer, take to a service centre or call out a technician, not so easy when you multi-ton item is doing 70MPH on a motorway.
I have yet to hear anything about an equivalent to the annual MOT check for autonomic systems either, particularly as there are no standards that can so far be applied to such systems.
How do these systems deal with black ice, aquaplaning and other severe weather that can occur unexpectedly?