Hi,
You dont need cluster change,as your cluster has km/h too. you need dealer to get km odometer instead of miles.
you get used europian e38 cluster face and install in x5 cluster,it needs some skills. or get complete demaged e38 cluster, I got for 50$.
change region to OCEAN http://www.xoutpost.com/articles/x5/n...odule-nav.html