I've owned a 307d and a 409d van but those are quite different than the 206d. I didn't realize they made these into the late 70's. I met a guy in France with one (a class C conversion). He liked it but said the steering parts required frequent renewal. I bought MB van parts from Euro Auto Parts in the UK about 10 years ago. Patrick was the export guy and he set me up with everything I wanted. That engine is the same as the engine in a 220d sedan I believe. There were lots of those 206d campers in Europe at one time. There was a company in Indiana which produced a Class C motorhome on that chassis for a while. One couple put lots of miles on theirs over many years and its in some kind of museum in Florida if memory serves me correctly. If that owner is still alive, he'd be the guy to talk to about those vehicles since he owned it for so many years.

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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