AC volume and balance

[longassname]

Hey guys,

I have a 2012 X5 5.0i with the m-sport package which is mostly pretty awesome; however, whenever my daughter turns up the ac in the back the AC in the front goes down to pretty much nothing. I took it to the dealership service department and they insist there is nothing out of spec on my AC.

I find it hard to believe this is normal. I’m in south Florida and while what air does come out of the ducts seems cool the overall cooling is completely inadequate. With the AC on in the back the front vents don’t blow hard enough to get enough air on my head to fight off the heat coming down from the roof. With the dealer uninterested in fixing it I thought I would ask if anybody here has any useful information before I start looking for an inde shop that can help.