I think fuel filter was every third service. I have the document somewhere on my laptop. Ill post it up later tonight when I'm on it.
2011 BMW X5 xDrive 35d Vermillion Red Metallic/Black Nevada Leather
Options: ZCW, ZPP, ZRC, ZTP, 300, 386, 496, 4AB, 6FL, Combox, LED Coronas. 04/11 Production