Klasse was the name given for the USA market but this means your buying a product which needs to be shipped from the USA to the UK whereas Carlack does not.
CarLack 68 - Nano Systematic Care SG is temperamental as it must be applied in very thin layers
Klasse User's Guide - Autopia Car Detailing Forum Dont let this put you off buying but compared to some of the more modern products eg Poorboys, Klasse can be a bit harder to use.
I should say my experience is with Klasse and not Carlack, which is a newer formula.
Just as an aside, the Carlack version is now available in the USA market but under a different brand name.