Hi, I just received my new '06 325i with premium, navi, heated seats, steptronic, sat radio prep. it's a ridiculous car. anyone doubting or even contemplating whether or not to get a 3-series, go out and get one right now. it's that good.

anyway, I noticed in the front driver's center armrest, there is a ventilated looking cupholder, and next to the cupholder is a switch. I noticed that when I flip the switch to a certain position, hot air flows out of the cupholder. What is this feature, and how do I use it?

Thanks.