Originally Posted by Tom K.
Interesting. In my '08, that switch operated the inflatable side bolsters which came with the sport seats. The lumbar control is a circular control located a few inches to the rear - and was only available with the ZPP and power memory seats.
My '11 has that little rocker button on the front corner of the seat, adjusts the side bulsters. Both front seats have them. No lumbar support on my seats, nor did I want it.