500km out of a tank......how about 1150+ klms? thought about an X3 2.0D? Bought one 6 months ago and consistently getting 6.0 l/100klm, when the stated consumption is 5.8 l/100klm, haven't checked recently but 6 litres puts a BIG smile on my dial.
Don't listen to anyone who says a 2.0D hasn't got enough get up and go, 130kw at 4000rpm....X5 is (I think) 140-150kw? but at almost double the fuel. Tare weight is lower, so power/weight ratio is good.
Did lots of research into the various models, then test drove a petrol and both diesels and came back to first preference (on paper) which was 2.0D M-package. First BMW and I couldn't be happier, sporty with extra power in reserve, handling and comfort above average. Suspension/handling/road noise were horrible at first, put on a new set of tyres (staggered) and it's a totally different vehicle.