The serpentine belt on my 97 C230 broke and i need a diagram of the layout to install the new one. Unfortunately i do not have acess to a manual. Can anyone help?

Your local M-B dealer can probably provide you with a copy.
Possibly a good jobber could as well.

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2007 C 230 Sport.

I believe its one of these....

Attached Thumbnails

 

This is usually in your owners manual.

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Kent Christensen
Albuquerque
'07 GL320CDI, '10 CL550. '01 Porsche Boxster
Two BMW motorcycles

The top left one is correct as long as you have air-co. The lower right one is for the c230 Kompressor version and actually is depicting the routing for two belts.