Because the 6 series were the equivalent of the MB 'S class', ie their 'flagship model', they put all the latest tech in them years before the rest of the range got it. HUD, soft close doors, LED headlights and full LED rears, i drive 5, full comfort access...etc, etc. First car in the 'F series range', at least 3 years before all the others (apart from the 7 but that was a 6 saloon).
Great VFM used as well, especially as the SE isn't as popular as the M-sport. The 650 engine is not the best, though, with it's 'hot V8' and both turbos sat in all the heat. Makes the N54 look like a reliable engine!