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AMS writes about V10 and V8 in the Audi R9 (not S9 or LeMans).

Top version: V10, 450hp
Entry version V8, unknown.

http://www.automotorundsport.de/d/82331

According to the article on AMS.de (link below) will the RS6 and S8 feature V10 engines. The issue of the German edition of AMS that will hit the stores on wednesday will feature more information...

If one look carefully at the pictures its rather obvious that the car doesn't have any foglights. Why?

Standard location for dual intercoolers!

So based on previous RS6-design, I'd say...