Originally Posted by: H0 
Märklin should have information about the correct composition of an ICE 3, yet they show incorrectly arranged ICE 3 trains at exhibitions.
Märklin should have information about the correct composition of an ERA II Rheingold, yet they show many incorrect compositions in their catalogues.
It is not unusual for Märklin to take some artistic liberties with their coach sets, like leaving some coaches out, replacing some coaches with other types from the Märklin assortment, ...
First off I would like to thank everyone who responded to my question. It is actually comforting to know that there is no right answer, so perhaps what I come up with is actually OK.

I knew that the knowledge I was seeking was out there and I also knew that the good people on this forum would help a Mäklin brother out.
I agree Tom. Märklin could do a whole lot better job on their history and research, although IMO they often come up with plausible trains, even if they are not perfectly correct. Really it is just laziness on my part to trust them and not do the research myself, especially since I know that they do take liberties. I also need to be more open to incorporating coaches from other makers, such as Kimball has done. Doing this gives a longer and more accurate consist and adds the variability that makes a train look more realistic.
In Kimball's 2016 thread he educated us about the coach order numbers imprinted on these coaches, and since there are only three of them coach6/coach7/coach8 is pretty straightforward. I felt that the Speisewagen should be inserted adjacent to the 1st Class coach, as Kimball suggested. It is my inclination to run the baggage car first, even though Märklin and your forum source Tom agree that it should be next to the postal car. I like good information and then I also feel totally free to ignore it when it suites.
So my order will be as follows:
Pw4ü-23: Pike wagon baggage car
C4ü-23: Pike wagon coach - 3rd Class
WR4ü(39): Mitropa Speisewagen
AB4ü-38: Skirted Passenger car - 1st/2nd Class
C4ü-39: Skirted Passenger car - 3rd Class
Post4ü-a: Skirted Car - German State Postal System
I added the English descriptors so that pathetic people like me can analyze this stuff without a key. -

I can add current conduction to the front of the baggage car if/when I decide to conform to the rules.
One thing I really like about this set is the mix of different but plausible coaches Märklin presents. It looks much more like a real train than the ideal world trains a lot of us assemble. Real railroads had to run what they had and often coaches mixed together as these are. They are all labelled for Stuttgart Tom, so you can't sort things out by that.
I do have one other question though. Why do the Hecht Wagens have ladders under them? Is that just because they hail from an earlier era when people were afraid of trains and thought that they needed readily available escape mechanisms? Perhaps there is another reason that I can not guess.
I know someone here knows the answer.

Edited by user 28 August 2018 13:07:41(UTC)
| Reason: Not specified