source. So, quite possibly real. Usually scam ads only have the two or three creatives who made it listed. (If you live in Germany, and have seen this, please comment.) That's a freaky belly button—are those sesame seeds? Ad agency: Interone, Munich. Note: Stupidity-wise, compare this to the infamous Burger King blow job ad.
update: confirmed via email (and in the comments) that this is a real ad.