Hello i am looking at buying an x5 2005-2006 3.0d sport got around 15K to spend i have had a bmw 525d m sport before but due to buying my first house it had to go and i have missed it every day i have seen one sliver, all the toys with 51K on the clock with a tracker fitted from a dealer 1 owner and full BMW service i see all sorts of posts about MPG and really need to know everyones view is also is there anything else i need to check ???