Just made the mod for the heather described here:
http://www.mynissanleaf.com/viewtopic.php?f=37&t=11412&hilit=leaf+heater+ohm#p263358
I added a variable potentiometer 0-1000Ohm in series with the 180ohm and a on/off switch.
By that I can tune in to the lowest temperature from the PTC needed...
