I've searched the internet for similar Mercedes factory images from the same time period (late 60's) and came up blank. I don't believe Richard is incorrect in his recollection of his factory tour in 1963 but I can't disregard the poster photo I have. It seems to me I recall one way to remove the engine is to drop the front subfame/engine/transmission as a unit which is the reverse of how the photo depicts the assembly at the plant.
Could this be a pre-production test area for the manufacturing processes? I am at a loss for any other ideas having squinted and tried to connect the dots for the last couple of hours.
The wording on the bottom white border of the poster reads:
Nr. 4180 Herstellung von Kraftahrzeugen, Aufnahme Hermann Weizsäcker. Offsetdruckerei & Co., Suttgart Der Neue Schulmann, Stuttgart
Is Singelfinden concidered a suburb of Stuttgart?
If someone is familiar with German is there any meaning in the text on the bottom of the poster as listed above?
For those that still might be interested I still have some of the C/D's of the scanned photo (in large formats, 238,555 KB as the largest TIFF file) still available along with a few pages of loose "Goggle translated" german text at $10.00 each plus $3.00 shipping (envelope and shipping to anyone in the US, overseas shipping would be more). Contact me via PM if you would like one. The size of the images should be able to be reproduced at you local large format color printer which would make a nice picture for your garage.
Regards,
280SE Guy