As one who's fluent in two of the three former requirements (guess which of German, English, and SAP I'm missing!), my question upon reading this posting was whether any German- or English-speaker who'd made his home in Buenos Aires would have any real interest in moving to Germany.
This does seem an odd place to put such an advertisement. Nevertheless, curiosity compels me to ask the compensation (when none is mentioned, the worst is assumed: in this instance, starvation in Düsseldorf).