Aspetta, forse per il Nexus S è diverso rispetto al Galaxy Nexus. Cioè, il NS continuerà a supportare l'USB mass storage anche con ICS. Ergo no problem per le vecchie autoradio.
Leggo infatti
[–]morrildl 3 points 1 month ago
Nexus S won't get Honeycomb (3.x), it will get Ice Cream Sandwich (4.0).
That notwithstanding, NS will continue to use USB Mass Storage, since it launched before we had the ability to combine media storage with internal storage. It has a separate 14GB partition for media, which can't be changed. So it will continue to work as it always has.
Whoa, whoa. ICS doesn't support USB mass storage? : Android