I'm now loving this thread about cruise control on a M3 CSL forum ..
As mentioned above but just to confirm from the said proper members
So what we need to add is cruise control for those times when you don't want to be in control ..
Cup holders yes the CSL needs those .. Arm rest .. Deeper carpet .. HK stereo .. Cheeky sunroof ( I do miss that actually )
Estate agent CV
And a autostyle carpet set with logo
Possibly the distant longing for a supercharger or some other daft tuning option that's not really any good other than for a magazine !