4.8i. forget the diesel, the MPG perks isn't even there realistically anymore now that diesel price is higher.
anyway, for 3000 more you get a higher residual after so get the 4.8i.

check this thread out for residuals

http://www.bimmerfest.com/forums/sho...d.php?t=290404

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2007 4.8i Space Grey, 20", black nevada interior
All options with no 3rd row, rear entertainment,
handling pkg.