Are you adding more vehicle options to justify the $5.5K increase in cost of the BMW Diesel vs. the Gasoline 6 Cylinder vehicles?
The price difference is $3800 between the 335i and 335d (only $2475 if the 335i is equipped with automatic transmission), and $4100 from X5 xDrive30i to X5 xDrive35d. As a standard feature the Diesel models bring a tremendous blend of performance and efficiency not yet possible with gasoline engine technology.