So a year and some months ago I bought a loaded "2009" X5 4.8 M Sport. I was at the dealer today and decided to check if my car was equipped with the 6NF(?) smart phone integration WITH AUDIO which I was told it had when I purchased the car and the iPhone dock. Turns out it doesn't. The parts person gave me a print out of my cars options and details. I was going over it on my way home, and saw that my X5 Production Date is 2008-04-04 in the printout.
Is my X5 a 2008 or 2009?

I know it might be a stupid question, or stupid for me to not know but I am getting worried/pissed about this.

Your help is greatly appreciated!

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2011 ///X5 M (On Order)

2009 X5 4.8 M Sport Space Gray/Black Fully Loaded

2007 GMC Yukon XL Denali Loaded and Customised