I asked in another thread and determined that the heated seats in the FiST are both the set bottom and seat back. What I didn't think to ask is whether the heat is variable. In my VW, there were 5 steps, in the MINI, three. In SWMBO's regular Fiesta it's just on/off.
And just the bottom, to boot! 
What is it in the FiST? Thx.