Another thing people are forgetting, since it is meant to be 100% fair. The numbers you guys are comparing are E63 S numbers with panoramic sunroof to CF roof M5. That adds an extra 100kg weight difference. The fair comparison should be between a CF roof M5 with a steel roof E63 S (if you are looking for the ultimate performance), or a Panoramic Roof M5 to a Panoramic Roof E63 S. I personally find it retarded to opt for the CF roof, when the panoramic roof is so damn nice (especially one like the E63's).
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