I suggested just to add to the regional cars.
And the Made For: Mercosur its for special configurations of European, Japanese and other car places that sell in Mercosur. Perhaps this itself is more applicable.

If it is not for replacing it in case we need a more general flag, I do not see the interest of adding it

Note: this Mercosur flag not replaces the country flag for the cars, its for the regional cars named before in the first message.

As well the Mercosur flag. But in the other countries (except Colombia and Ecuador) not built cars. The production concentrates in Brazil, Argentina, Uruguay, Venezuela (full members) and Colombia and Ecuador are a Associate members. See you: http://en.wikipedia.org/wiki/Mercosur

It would be better to have a whole south-america indication, no?
Like north-america would often be more accurate than USA/CDN

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.