If you happen to be in Berlin and all you want is Italian Wine and Simple Foods, Muret la barba * will make your day.
As you can see from picture above, this is no fancy schmaltzy tourist trap, rather a place where the locals hangout.
Check the Chalkboard for the Menu (Lunch I believe below).
Since the place is small and the prices reasonable, it might be a good idea to call them first if you plan on eating there.
Muret la barba is located at Rosenthaler
Straße 61 in Berlin.
Their Phone Number is: +49 30 280 97 212
The only semi-detailed article in English I found with other options is Wine Bars & Cellars in Berlin (on Gridskipper). Since the article is from August 2008, I suggest you check if all of them are still around…
A taste of Italy in Berlin for A Bistro A Day of March 15
(* Website is in German only)