To your comments :
1- I Don't care what others are saying, just brought up the comment in order to reflect how noisy it is.
2-That is a possibly a fact but I think there is something else there that is not fully opne, stopped or something. I understand there are 2 fuel pumps in this car as opposed to the 335d.

3-another known point, but asking if anyone has fiddle with the possibility of reducing the noise some way some how

For me the car drives fantastic and love my x5 35d. I haven't gotten any issues with it. The only one thing that annoys me a bit is that engine clatter at acceleration. I love BMWs and love to play with them )driving and mechanically ;-) ) .. but this is one have no clue where to start..

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2011 BMW X5 35d - Titanium Gray/Black Leather PP, SPP, HIFI Radio, Manual Sunshades, Step rails, LED Coronas, Brushed Aluminum Roof Rails, HID Fogs, 22"Hartge Classic II :Front 10.5x22 - 295-30-22 Rear 12x22- 335-25-22