I've read a good bit of info here about cold weather's effect on range, etc. I'm just curious if there's a point where it's not good to be driving the Tesla when it will be sitting out (not connected to a outlet). Early next week, the highs in Chicago will be below zero. I have about a 50 mile (round trip) commute and at work my car is in the open (not a parking garage) with no access to charging. I remember a couple of weeks ago when it was in the teens, when I returned to my car to head home, I got the "regeneration has been disabled, drive with caution" (or something like that) warning, which went away after 10 minutes or so of driving. I'm still operating under the assumption that as long as I start out every morning with a "full tank" and "preheat" the car before heading home from work, everything is safe. Just curious about if things get more dicey with sub-zero temps (and, as I said, my car sitting out in an exposed parking lot for 8 hours). Thanks for your thoughts!