Yeah, that's what it says, but I'd be really surprised. MAN is a pretty big manufacturing company, and diesels are one of their products (it was paritally founded by Rudolf Diesel) so why would they buy motors from MB?

Buddy of mine drove a big MAN for supply convoys in the first Gulf war. Said that it was a HUGE air-cooled turbo diesel...

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1984 300 Coupe TurboDiesel
Silver blue paint over navy blue interior
2nd owner & 2nd engine in an otherwise
99% original unmolested car
~210k miles on the clock

1986 Ford F250 4x4 Supercab
Charcoal & blue two tone paint over burgundy interior
Banks turbo, DRW, ZF-5 & SMF conversion
152k on the clock - actual mileage unknown