I have emailed Tesla asking if the model S is flat towable. The response I got said no, as the gearbosx is only lubricated when the car is ON.
I did a bit of research and found out that the Model S has a Borgwarner gearbox, that is mechanically lubricated. In other words, so long as it is rotating, it is lubricating. The only thing that would keep it from being flat towed is the Park Pawl, which can be electrically overridden.
The reason I want to be able to flat tow, is because I have a diesl pusher motorhome and would like to take my primary car with me. Yes I know, I could trailer, but you try showing up at a camp ground with a 40' RV and a 20' car hauler trailer. 90% of all camp ground(especially National parks) cannot accomadate that combo. Most RV'ers flat tow and then park their car sideways in front of their RV or park in the overflow area. Also, if the Model S could be towed, then I could charge it with my Diesel Generator. It puts out 220V @ 45Amps. Enough to charge.
So, I ask an Engineer from Tesla to weigh in on the subject. Do you say it isn't flat towable to avoid warranty issues, like toyota with their the FJC(yes I flat tow my 6MT) or id you guys really forget to think of all the potential RV customers who would love an all E car. If it is just to avoid warranty, then I could careless and would reserve one and when I get it, make it tow ready like my FJC
6MT FJC towable