The first update added Speed Assist for highways to detect speed limit signs in the United States, along with a Priority Bluetooth Device feature, plus a Glovebox PIN.
The second 2020.40.0.4 update added a Mobile App Vent Windows feature for Model S, along with a Charge Port Inlet Heater for Model 3 and Model Y.
Now, more features are also coming in 2020.40, according to Tesla hacker @greentheonly. The user stated this evening, “So with 2020.40 now out we can see that one of the new chargeports reported earlier was Model 3/Y chargeport with inlet heating,” which was what we saw in the 2020.40.0.4 update.
But there’s more, according to @greentheonly, who says the heated charge port feature will eventually reach Model S and Model X.
So with 2020.40 now out we can see that one of the new chargeports reported earlier was Model 3/Y chargeport with inlet heating. and now this heating support was enabled (model S/X upcoming later it seems).
also highway speed sign support (us only), local sped limits (CA, AU, NZ
— green (@greentheonly) October 1, 2020
The user also stated that local speed limits will be debuting in Canada, Australia and New Zealand as well, debuting outside of the United States for the first time. This means users in these countries, should expect to be able to track local speed sign limits with their Tesla, in an upcoming 2020.40 software update.
As for why Tesla has separated highway speed limit support versus local road support, some owners have noted how their vehicles have been able to detect highway speed limit signs in 2020.36 from late August. But according to @greentheonly, this should only happen if routes match Tesla map data.
For Tesla owners still waiting for a 2020.40 update, the release for those in Canada, Australia and New Zealand should be a good one.