I kind of wish it did too, my VW Touareg had dual climate control rotary knobs and you could 'lock' them so that both zones adjusted from one of the rotary knobs.

It's a minor annoyance to have to push both buttons on the X5. I like how the new X5 and our E90 have rotary knobs for temp rather than the buttons. Just a little easier to adjust them. Ah, what ya gonna do...

__________________
2007 328i Sport, Monaco Blue
2011 X35D - sold -Space Grey
2004 X5 4.4i - sold - Kalahari Beige
2001 X5 3.0i - sold - Pearl Beige
2006 325i Sport, Sonora Beige
2000 323i - sold - Sienna Red