Ok People there is a problem that bmw are not going to sort now
If you tell BMW to take the box out for clutch slipping and you are willing to pay for it as long as the clutch is worn below the limit thats fine.
BUT and its a big BUT if it is within spec i want warranty or good will to pay.
Thats how to tell bmw you want the clutch sorted as all the CSLs i have seen
and thats a few with some at 54,000 miles and the clutch was fine but flywheel had burn marks on it warranty picked up the tab
Cheers Mark CSL