Visa Mercosur... how long should I wait? (Santiago de Chile)

Hi guys, can anyone give me an idea of how much time it takes for the Visa Mercosur to be granted? I've heard about other VISAs to take as much as six months, but I would like to know about Mercosur´s one.
And also... once is granted, how much time do I have to stamp my passport?
Thanks in advance!

Hola a todos! Tiene alguna idea de cuánto puede demorar la VISA Mercosur en ser otorgada?
Y qué plazo hay para hacer estampar el pasaporte una vez que es otorgada?
Muchas gracias!