Hello, Ive been working toward possibly purchasing a Mercedes sprinter van, 4x4 low top. I plan to add a pop top and have aims of traveling to Chile from California. Ive recently heard mixed feeling about the pop top and the newer diesel engines in relations to the low sulfur gas available in south America. Ive traveled a lot through various areas of central and south America but always rented vehicles. If any one has info or thoughts around this I'd love to hear. My reason for the lower top version was shipping abilities in cargo containers.