Assuming everything works out on Friday, my next step will be forced induction. Because of space limitations I and looking at either the supercharger from a 55K motor or a rear mount turbo. Here is some videos of a CLK430 with a rear mount turbo. A turbo'd V8 Crossfire should be pretty quick. i have also poseted a link the the build thread. This is one of my favorite MB forums becasue most of the guys are all gear heads with good attitudes to modifying their cars. There is another guy on there that has already done the Rotrax supercharger which I have no room for under my hood.

YouTube - CLK430 Rear Mount Turbo, burnout and powerslides...

YouTube - Rear Mount Turbo Mercedes CLK430, build pictures and powerslides

CLK430 Turbo Build Thread. - PeachParts Mercedes ShopForum