Transit is 5×160 pcd
BMW is 5×120
Can be done with adaptors, but you’ll be looking at £300 for those.
Tyres need to be load rated and really wheels do too
BMW X5 is higher load rating than my Transit 🙄
So Basically if you want to do it safely , check the load ratings of the vehicle to which the wheels were originally attached, pick wheels that are over rated for the van, fit correctly load rated tyres.
Expect the Van to tramline like crazy, ride really harshly, get worse Fuel consumption, be less tolerant of potholes and wear out those nice low profile (And mega expensive) tyres in a very short period of time.
It will look better though (But generally only if you Lower it to suit)
Hope that helps 😀