The buy rate (base rate) for a 2010 X5d is indeed .00255.
The dealer can mark this up by .0004 and any such markup is added profit for the dealer.
This should be a negotiated item when leasing a car.
Keep in mind there is also an acquisition fee of $725. This is allowed to be marked up by upto $200. Again, it's another item to be negotiated when leasing.

When I leased my 2009 335xi last November, I agreed with the dealer on $825 acq fee (+$100 for them), and .0001 mark-up on the lease rate (I got a smoking deal on the negotiated price of the car).

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*2010 X5d - Space Gray/Black Nevada/Dark Bamboo|ZPP|ZAP|ZCW|ZTP|ZRC|322|328|386|4NC|4UB|655 |6FL
~Ordered 8/27; Production began 9/28 at 12:20pm; Completed 10/7; Delivered 11/4!~
*2008 535i Black/Black - Dinan Exhaust & S2 Software
*1995 318ti Clubsport - Hellrot Red (autocross/fun car!)
Past: 2005 X3 3.0i; 2009 335xi