In my jurisdiction, you actively CAN NOT submit evidence before hand. That's the point of small claims, it's fast, easy, and low process. The whole thing happens while you and the defendant are there. The judge isn't going to be reviewing anything ahead of time.
But of course you want to prepare for what you're going to bring to court.
Is there official documentation of this somewhere? Any other advice for preparing for the trial would also be appreciated.
One of the things I've tried to explain here is that you have to collect your own evidence, and have your own story. The statement that this is a known software bug was told to me by Tesla when I actively asked them about this issue, and ASKED THEM TO FIX IT. I have it in writing because it's in my chat history with them. But notice that this happened because I actually ASKED Tesla to fix this first, and they looked into it, and told me the fix was MCU2, out of pocket, despite the car being under warranty.
I'd imagine a case going quite different if you show up in court, and your argument is that your MCU1 didn't work well, and Tesla sells MCU2, so you want to sure for that, but you never once asked Tesla to repair your car under warranty. A breech of warranty claim requires you to try and use that warranty, not just assume it will be denied because someone else was denied.
So
@Tim B. - I'll turn it around. What issue are you having with MCU1, and what kind of communications have you had with Tesla where they have been unable or unwilling to resolve them? Those are the exact communications you want to bring to court. In my case it was as simple as that- I asked Tesla to make the voice commands in my car work as they did when I first got the car, they said they couldn't because it was a known SW bug and they couldn't revert SW because of a NHTSA recall, and the only known fix was MCU2, but it was not free. I have all that in writing, and it was all I felt I needed to bring because it told the whole story of a warranty breech right there.
The claim for the HW2 to HW3 was a bit different in that Tesla had many advertisements about having all HW needed for FSD. But I still brought the same thing- an Invoice from them, for more than $0, to upgrade hardware before I could subscribe to FSD. So one thing that could be helpful is a quote from them on the MCU upgrade.