When looking at the engine from the front, it rotates clockwise. Moss Performance makes kits to install essentially the same Eaton supercharger that MB uses, although I believe the one they use on Hondas are like in the SLK.
Here is a link, maybe you can find some good info there:


http://www.mossperformance.com/Shop/ViewProducts.aspx?PlateIndexID=33371

Gilly