When I took delivery of my Tesla Model S, I knew that it had a lot of cool hardware that was slated to be enabled progressively in future software updates. Forward looking radar, steering-wheel control servos – all sorts of nifty things.

This morning, my son Felix found out about a very cool piece of hardware that has been quietly built into cars manufactured since late last year that include the ‘cold weather’ (or ‘subzero’) package.

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