A spotter's blog from Buenos Aires (http://aerar.blogspot.com/) reports that D-AIFC visited EZE on 1/17/13 - where it can be seen being catered and refueled.
I asked the photographer and he tells me it was in addition to LH's daily 744 FRA-EZE-FRA rotation.
To add more mystery to the visit, this seems to be a MUC-based airframe; according to some online databases it flies mostly out of there but with the occasional rotation out of DUS, but with an AB call sign - the plot thickens or the DB are cocking up. Hardly unlikely!
Does anyone have any ideas what was D-AIFC doing in Argentina - as I don't think Lufty has ever sent the classic 340 to EZE in scheduled services - only the 744 and 346 in the last decade or so.
Curious in San Francisco,