Thorsen,

I did this exact changeover back around March of this year. I would guess that I am getting maybe 1.5-2.0 MPG increase in highway driving. R Leo has nailed it on the facts of the installation.

Brandon, I would agree with you in theory as far as the additional (maybe excessive) shifting in town, but I have honestly not experienced this change in my 300SD. I can't account for why this is the way it is, but I will not complain about it. I don't understand why the 2.47 was not included in the factory package. Tremendous comfort change on the highway and no noticeable change around town. I still have been able to keep the 0-60 time just under 14 seconds. Last summer we took the car down through the Ozark Mountains. It was loaded to the brim with 2 people and enough food and beer for a week. No problems at all. I realize the Ozarks are not the Rockies, but it was a better test than the flat plains with which the car is accustomed . I do agree, by the way, that Thorsen's mileage is way too low and that there must be some other factors working against him there. I doubt that the 2.47 changeover will fix this issue.

Tom

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1993 300TE
1984 300D
1984 300SD
1976 BMW R90S