I was wondering if they agree to add the flag of the Mercosur and the Made for: South American Mercosur and in some own cars (as an optional if they so desire).
Example:
- Volkswagen Fox built in Brazil (all versions) and built in Argentina for the local market (5 door versions in diesel and gasoline).
- Suzuki Fun/Chevrolet Celta.
- Fiat Uno (and restylings).

Flag: http://geografia.laguia2000.com/wp-content/uploads/2008/01/mercosur_flag.png

It's only a suggestion.