>> * can’t access car during peak CO2 emission times because you got the cheaper monthly rate that uses a green subsidy to pay for the cheaper rate
This sounds like a feature that opens up a new avenue of potential financial engineering. If your car could enforce that it was in 'green mode' or didn't drive at certain times and you could get a subsidy or tax break for it, that might potentially be a good incentive to encourage more environmental friendly lifestyles and practices. That doesn't seem like a bad thing to me, I might not want to buy that feature but it allows for some interesting possibilities. The buyer would have to agree to some stuff at the time of purchase (or lease as it sounds like it would be) to enable this.
We should be mindful of potential unintended consequences of these things. There are some good frameworks in place though, despite what you're second point suggests, Ford has relatively limited liability in the case that their car is driven by a bad actor (cooperating the the police or not) the second that car starts driving on its own, for whatever reason, Ford has some liability.
I remember my grandfather being relatively upset at the idea of GM knowing his GPS coordinates when his Cadillac had onstar. Now there have been hundreds or even thousands of cases when OnStar has had a positive outcome on peoples lives after a crash or something, including times they've reported it before anyone else. His tune changed dramatically one time they remotely unlocked his car and remotely started it so he could get home when his fishing boat turned over and his car keys were at the bottom of a lake though.