Go with low sulphur diesel if I were you. Afterall: most of these MB diesel engine designs originated from Euro-IV specifications (I believe), which is designed for ultra-low sulphur diesel to begin with (citing most industrialised EU countries such as Germany, etc. already on
No, unless NA general understanding on diesel engines, my take on this is that MB diesels operating on NA continent should go for as low of sulphur diesel as possible.
Q.