The supercharger found on the 1999/2000 C230 is not considered a "kit" or an aftermarket item. Therefore it is not an item you purchase and just add/bolt on to your car. There are lots of residual parts and re-engineering and additional part added with the superchareger, like a different computer chip etc. What year and model C-Class do you have?
[This message has been edited by Kevin (edited 02-13-2000).]