Don't worry, your Tesla S works in winter.

[botsapper]

The batteries and your tush should be warmed up after your morning shower, the traction system will keep it in your lane and your door handles free of ice.

http://www.youtube.com/watch?v=GS9uDJGi52A

...but physics still say cold temps will lower the discharge capacity of our lithium batteries; electrolyte conductivity loss.

How to Prolong Lithium-based Batteries - Battery University

[AntiochOG]

I wish I could preheat my car to preheat itself off the grid.

[jakobnev]

AntiochOG -
Just mod it so you can!

[Daox]

Agreed.

Space heater + remote switch (for Christmas lights) = warm car anytime

Hit the button 20 minutes before you go and you walk out to a warm car. I did this for a while on my Paseo.