Daily Mail: Will blue gas kill Tesla? New emission-free liquid hydrocarbon fuels a 300-mile trip on a full tank.
https://www.dailymail.co.uk/sciencetech/article-9275621/Will-blue-gas-kill-Tesla-New-emission-free-liquid-hydrocarbon-fuels-300-mile-trip-tank.html
It's shown as a single (up and down) dealer enabled custom option in my handbook. I can't see the benefit of enabling just one direction?
One can (on my 2019 RC) also use the mechanical key to do the same thing, once the setting has been made