I don't see how diesel could retain it's value more. This is not an F350 or a Dodge Cummins. It's a Sport SUV. A majority of americans still shy away from diesel, due to it's lack of availability in some areas. I've owned diesel trucks for years, and had no intention on looking at a Diesel X5. But the incentives have lured a lot of people to them. Those incentives alone can bring a buyer from a lower price range, right in to X5 territory.

__________________
2013 X5 Xdrive35i Premium
2013 F30 328i
2004 Mustang GT Very Modded...