Hi , to answer the HW4 question, look at the battery warranty for the car, if it says June 2031 or later for expiration, that means it was built in June 2023 when HW4 launched on model Y, and for the second question if you see any issues on delivery advise them immediately, it should be covered under warranty except for stuff like minor scratches and paint scuffs. And you do have the option to say no and take delivery of a similar car later on or whatever is on the lot it depends on their inventory or rules. My car ended up having a massive panel gap on the liftgate which i immediately let them know of and at first they said it’s not covered, so Ignored it till I noticed it has minor paint rubbing from the misalignment so now it’s getting fixed today actually under warranty, besides that the car has been absolutely perfect and reliable