You can buy the manual right here: http://www.books4cars.com/result1.asp?imageField.x=118&imageField.y=55&findmake=Mercedes&offset=200
It is the 7 th one down the page. Had mine within 3 days of ordering.
Here is also a list of M-B approved oils for you car:
http://www.whnet.com/4x4/oil.html

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2007 C 230 Sport.