The 520d accounts for 60% of the 5 series beamers sold in the UK (and I believe Europe). The model I have has a 177hp (132kW) direct injection turbocharged engine and 6-speed automatic gearbox. This is quite modest by BMW standards but is astonishingly quiet and smooth to drive and I have not found the power lacking in any situation yet. I know you guys in the US aren't so concerned with fuel prices but here in the UK, deisel fuel is £6.40 per gallon (approx $10). The fuel economy of my 5 series is excellent for a car of this size and power - 43 miles per gallon overall and over 50 on motorway runs. In short, I would say this is the best all-round car I have driven.