2011 X5 35i: Ticking sound from defrost

[oracle]

In my two month old 2011 X5 35I, I just recently noticed a quiet ticking sound when I turn the defrost on. When I change the air flow to just the upper or lower vents, the ticking sound goes away. Has anyone had this issue and what was done to resolve it? I am somewhat reluctant to take it in to have the service department look at it...they probably have to dismantle the dash to figure it out