[JSH]

Originally Posted by cRiPpLe_rOoStEr

I remember the 2nd-gen Mercedes-Benz ML-series, imported from the USA, had a "low-quality fuel" tune in Brazil, but DEF wasn't even mentioned as of 2008. It didn't have a particle filter, and the fuel filters had a higher-density media. Now such option would be pointless, as not even the S-500 Diesel is so easy to find in Porto Alegre anymore. There are rumors that Petrobras might import Russian Diesel fuel to get the prices down, but I wouldn't be surprised if that would be mostly S-500 instead of the S-10 Diesel fuel, catering mostly to the commercial trucks and intercity coaches, considering that many are fitted only with SCR and would still tollerate a higher sulphur content that an engine also fitted with EGR may not handle so well

500 PPM sulfur diesel won't effect EGR but it will poison the NOx catalyst and plug up a DPF. Even 50 ppm diesel will kill the emission systems on a Euro V or EPA 2008 truck.