So I've been frequenting Rennlist. The services every 5k is just a myth. The first service is at 5k to get rid of the break-in oil and then it's variable. On board computer will tell you when it needs a change.
2011 X5 xDrive 35d Red/Black: ZCW, ZPP, ZRC, ZTP, 300, 386, 496, 4AB, 6FL, Combox, LED Coronas. 04/11 Production