Since MB made some of these vans with the 617 turbo, I'm betting they made/make? a manifold which puts the turbo in a different position. If you speak German, I'd try calling someone in Germany who could probably answer the question. There is at least one 309d van in the US with a turbo on it from the factory but I've never seen it in person or a picture of the location of the turbo. If you can find the guy who owns it on the internet, perhaps he could send you a picture.

Kerry

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13