I had the car in for service and what they told me is that power-down reboot is something they have disabled in the software, allegedly it's not "something that should be done casually by the user. The mobile service people can show you how to do it". Maybe those who can still do it have stumbled on some detail that enables the secret way to do it. Maybe telepathy. Or where you sit, exactly.
That's a bit strange. No, very strange. The last story I heard was that "these cars never fully power down".
Now it's "it shouldn't be done, but there's a way someone might show you".
They charged me $68 to replace the cabin air filters because debris had gotten in.
It suggests that maybe those screens you can buy to cover the inlets might be a very good idea, as long as they aren't tight filters that could strain the fans.
What they are talking about is disconnecting the Contactor under the rear seat, not the power down from the menu (no one would need mobile service to show them how to select power down in the menu).