Hello... I see that the Nappa Leather Option is: "Nappa Leather $1,500 Hand-wrapped surfaces of soft supple Nappa leather. 12-way power adjustable, heated seats with memory." I read on the blog when the price increase was announced that: "After the price change, all vehicles will include 12-way adjustable, heated front seats as standard equipment at no charge." 2013 Model S Price Increase | Blog | Tesla Motors Is the $1,500 then to add memory and Nappa leather? I don't understand what the standard vs. upgrade is.