Regarding the xDrive fluid change, in theory you are supposed to reset the transfer case module (VTG) oil wear adaptations after changing the fluid - some folk do and some don't. Jury is out as to how important that bit is. I did the reset when I changed my xDrive fluid a few weeks back - using BMW DIS but I think the Foxwell unit can do this reset too.

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)