I'd have to look at my records but 10k miles even up to 15k miles seems to be my interval for DEF fill ups. I could even tell you how many gallons I've used over that time. I used to fill the passive and active tanks but now just fill the passive tank when it comes time. I'm thinking of even changing that and just fill it every oil change which for me is 7k or so miles. There is method or technique to filling to make sure it's properly filled. Now that I know how much and how often to fill, I know not to stop until I get that much in.

Pretty sure BMW uses all the same speedometer calibrations for wheel and tires sets so I doubt there is a routine method to adjust this. Perhaps with some deep level programming, it could be changed. I doubt they'd have made it easy or straightforward.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim