I have to head to school for finals in a few minutes.....but this question got me to wondering......

I looked up Mercedes in 'Diesel Motorships, Engines and Machinery" by Christial Knack......no Mercedes....BUT...they do list a Maybach Type MD 655, V12, 4 Stroke, 950kW/1274hp @ 1500rpm....I don't know what the exact connection that exists between MB and Maybach is......but the Maybach is in there.....it is specifically notable because of it's "tunnel' style of construction....this allows the crankshaft to be axially shifted in and out of the crankcase....main bearings are also roller bearings....

I think, perhaps, that if MB did make Marine Diesels for the Kreigsmarine, they most probably would have gone into Schnell Boats (PT Boat, sorta).....

Will look at other references later when I get home.....

SB

and yes, I am embarking on a second degree....this time Surveying/Forestry......

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Diesels:
'85 300D, "Max, Blue Benz", 155K, 27.0 MPG
'84 190D 2.2, "Eva, Brown Benz", 142K, 40.2 MPG
'77 240D (parts car)
'67 Eicher ES 202 Tractor "Otto" (2cyl, Air Cooled, 30HP)
Gassers:
'94 Ford F-150, "Henry", 170K (300 Six) 17.5 MPG
'85 190E 2.3, 148K....Parts Car
'58 Dodge W300M Powerwagon (Flat Fenders) Less than 10 MPG