Some people like the cabin at a certain temp but prefer to have cooler air in the center, which is more likely to hit their face. I think it is kind of a 'safety' feature, as cooler air on your face is more likely to keep you awake if you are tired than warm air (but I could be wrong about that).
Originally Posted by slambmw
Sorry, the centre front/rear vents only. Don't understand why you need to change the temperature when you can set the value on your centre console.
Not sure why they have this secondary temperature control for essentially the same purpose.
2013 x35i (Space Gray, MSport, CW/CWII, DHP, Premium, Premium Sound, Technology, BMW-Apps)
Retired:'09 C300 4Matic, '09 GTI, '06 750i, '05 C55, '04 R32, '03 M5, '02 GTI, 01 M5, '00 M-Coupe, '00 540i/6, '99 M3 Coupe, '98 M3 Coupe, '96 328i, ..., '86 4000CS Quattro, ... too many to list