I just stumbled upon this thread today, and oddly enough about 3 hours prior to, I was just as perplexed that the AC could suck this bad (also in AZ, and black on black X5 here). I was thumbing through the menu and saw the same rear ac option and unselected it... then BAM... frosty cold high powered AC thats just like my 435i. I dont ever have anyone in the back seat so I couldn't care less about the rear AC being on.
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2014 M5 Competition with ESS Tuning Flash
Gone but never forgotten...2015 X5 50i M Sport, 2015 550i M-Sport, 2015 M3, 2014 X5 50i M Sport, 2015 435i M Sport, 2011 550i, 2011 535i
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