...car's interface to tell if FSD is enabled?
...the owner api...
So the certain way to do it is to connect to your car via the owner api (More info here: Introduction - There's also a thread discussing it here: Tesla Owner API Tutorial (All you need is your browser))
Once you authenticate and get a bearer token, you can request vehicle info and get option codes. I just checked mine (using Postman, makes it easier than curl commands) and sure enough APF2 Full Self Driving was on the list for me. You can also use the options decoder here to put a comma separated list of codes: Tesla Options Decoder
You know the irony is that there is such a secret squirrel group. It has the terribly named acronym of EAP standing for early Access program rather than enhanced autopilot. Anyone who bought fsd before all the crazy price changes was automatically confirmed as an honorary secret squirrel.
This is the kind of reply I was hoping for. Mine says “AF00,APF1,APH2,APPB”I saw somewhere you can use the remote s app. Click the logo at top. Then go down to copy vehicle data. You should have option codes in there. APPB is for enhanced and APF2 is for FSD. As someone mentioned above the only issue with this is if they made a mistake they could change this but this should show current state.
My S has EAP and I have the option to upgrade to FSD on my Tesla account online. My wife’s X has EAP, although it technically shouldn’t; it was an inventory 100D that we purchased in December, as the X we ordered and were waiting on was going to be pushing it close to making the end of year $7,500 tax credit. So, Tesla gave us an inventory instead that matched our order except it has EAP and we weren’t wanting that. They took the price option off the final price, except never removed EAP from the X.
Also, now when I’ve gone on her X account on our Tesla online manager, it does not give the option to upgrade to FSD, or even EAP for that matter. I too am wondering if it has FSD already