Look in your owners manual. The upper knob in your picture is the climate control heat/cool adjustment knob. The lower smaller knob is where the heated seat (if you have one) is controlled. That was on a 2009 so not sure if that's the case with yours. Obviously your C6 has been built if you're wondering if that lower knob controls the Alky.
yeah I'm wondering about the small knob
I may just pull apart the trim and see where it's connected to
I don't have heated seats (or if I did. the buttons are missing)
and the left side is that knob