The website of the Argentine Embassy in Miami has the most comprehensive information. Unfortunately, it is only available in Spanish. Here is the link....
http://www.consuladoargentinoenmiami.com/seccion_consular.htm
Régimen
de importación para argentinos y extranjeros que ingresen al
paísYou can contact them via e-mail for additional questions. Hopefully if you write to them in English, they will answer you likewise. I did a lot of research on this subject on my many trips here. I selected not to bring my car, although I could duty free. The cost to transport here was too high for me. But I did ship a container full of household goods, including living room furniture, mattresses, sheets, towels, kitchenware, electronics. I do not regret the choices made as the quality of my used goods far exceeds what I could purchase here new. I did buy here a dining room set and a refrigerator.
I shipped goods twice. Once in 1992 and a second time in 2004. It was my 2nd experience with Argentine Customs. This time it was a quick and efficient process. I had the paperwork to be exempted from duty fees....and there was no hint of bribes.