I don't really understand people who won't buy the X5SD if it isn't as quiet as Brand X Diesel Y. Realistically, there will be a very small--if not unnoticeable--difference in the noise level of two competing diesel luxury vehicles. It's not a reason to pass up a car as good as the X5 is.

As for the other posts today... I love the 4.8i but am starting to regret not waiting for the diesel because of the mileage. It's truly horrendous.

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'08 BMW X5 4.8i *'06 Audi A3 2.0T DSG *'05 Audi S4 Cabriolet

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