MoonX5 appears to have a 4.6is, so none of the E46 threads will be much help...

There is some tuning info on the M62 here...

https://www.torquecars.com/bmw/m62-tuning.php

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