Any external network connection must be disclosed to the user. The car must come with instructions how to disable it
All functions of the car must remain permanently operable
I think this needs to be refined a bit. As phrased, you're just making any features that use network connections illegal.
The next law I want passed:
The "Cars can't require a network connection" law: Any external network connection must be disclosed to the user. The car must come with instructions how to disable it, (which must be a user serviceable physical hardware switch, fuse, jumper, etc). All functions of the car must remain permanently operable with no nagging of the user to reconnect, other than an optional initial prompt to inform the user of the change. 0 repercussions may be brought on the user for disabling the network connection, such as 'we can't diagnose/fix your steering because it can't connect to the network' or 'we can't update your infotainment system with your network connection disabled', as those updates could easily be done via the OBDII port.
Hell while we're at it, pass this same thing for robot vacuums, garage door openers, and 1000 other "smart" devices.