Although I haven't found what I'm looking for (charge regulator pressure converter valve affecting the EGR), it's always appreciated when there are people willing to help others selflessly. Best regards
Alejandro Hurtado, December 23, 2008: Excellent information, well-illustrated and helpful. My Laguna sedan is a 2007 model; it's slightly outdated, but quite similar, which is helpful
The manual is very good and all in Spanish, the only downside is that it doesn't include the 2.2 engine, which is the one I'm looking for. But overall, it's very good.