I skimmed the actual legal filing [+]. The TLDR; is that the Tesla repeatedly portrays the technology as (1) better than it actually is (2) closer than it actually is to being fully ready.
The basis of relief is violation of implied warranties and false advertising.
I think its going to be interesting if this case actually proceeds forward.
[+] https://www.classaction.org/media/matsko-v-tesla-inc-et-al.p...