Okay,
Here is the engine manual, although it is for the DIVa engine, sorry, it's all I've got. Even though it is a latter version the design might have remained very similar. How's your German? The manual is in German of course, I hope you can read it as it might explain any cylinder offset in the text.
There are two useful diagrams - but they may only add to your conundrum. The left hand sketch shows a slight offset whereas the right hand profile seems centered. Maybe the text of the manual will enlighten us all.
I will keep searching for other info.
Good luck,
Brian
Too large a file to attach the manual, here is the link
http://home.comcast.net/~shademaker/DIVa.pdf
from the Aerodrome Forum
http://www.theaerodrome.com/forum/ai...ne-manual.html
Might this be of help?
Daimler Motor Mercedes 160 & 180 HP 1914-1918 general arrangement and detail drawings - 2 sheets full of dimensions and technical descriptions. Drawn 60+ years ago by W. A. Wylam 1947 with assistance from Msrs G. D. Angle & E. H. Sherbondy.
http://web.me.com/blairsaam/eBayAuct...1813_29338.jpg