Just thought I'd post this. A member on a UK forum I'm on has posted about this.

Heres the product:

http://www.kalimex.co.uk/section.html?secpath=01.07.&pgid=38

Heres the original thread:

http://forums.mercedesclub.org.uk/showthread.php?t=25013

My cat is almost brand new, but I thought since you guys are scrupulous about keeping your engines clean, it might be a new toy for you all to try It seems to be a genuine product with data to back it up.