Hmmmm, okay... just a few thoughts:
About the BR 612 in S-Bahn service:
It has never been and will never be in this service. Each unit has only two quite small doors which aren't suited for fast passenger exchange.
BR 103:
It was always in IC services, there was never a time when it did IR only. In the first year of the IR services, it was originally planned to only use orient-red 103 for these trains. But the IR network grew larger and that wasn't possible any longer. In addition to that, the BR 120 was never designed to replace the 103. So the 60 locos of the BR 120 wouldn't be enough to send 145 locos of the 103 out of service.
Actually there is still one almost planned IC service which is hauled by 103 245-7 during the weekend.
BR 111 for S-Bahn:
The S-Bahn service was a horror for the 111. Like the 110 this loco was designed for longer local or medium long distance trains. But definatly not S-Bahn which has to stop every 1-5 km and has to speed up fast.
Due to that, it was replaced by the BR 143 right after the Bundesbahn and Reichsbahn merged into the Deutsche Bahn AG. The 143 had better acceleration and it wasn't that unreliable for S-Bahn trains.
As of today, the 111 is only in use for medium to heavy local services.
BR 181 and freight:
This
IS also a freight locomotive. It still is commonly used in german-france freight trains. Of course it is kind of weak, but those trains aren't that heavy anyways.
BR 232:
Yes, it was and still is used for passenger services. It is used for all kind of passenger trains: Local, IR and even IC. Today the are mainly used in IC services (besides the frieght of course!) as well as local trains when the BR 612 or 610 is out of service again
Which leads again to the 612:
This machine should be very unreliable, like the 605 (ICE-TD). At the moment, these trains again aren't allowed to use their tilting technology as well as some other small problems.
V100:
It has always been in local freight service. Actually this is the virtually only left service for these small diesels.
About the InterRegio trains:
When they started, the BR 103 was the main engine for these trains. But up till the mid 90's, the situation was different. The 103, 110 and 111 were the main engines for these services, with 218 and 232 on non-electrified tracks.
In DB AG years (after 1994), the situation changed completely. 103 and 120 were the only engines used for these trains (besides again 218 and 232). Before the IR service was completely canceled (let's say 2001-2002) and turned into IC, the 101 and 120 were the main engines. 103 was only available for rare backup.
And over all for the years 1947-1994:
Although there are of course fixed services for each engine, the Bundesbahn used what was available for the trains. The 110 wasn't a rare guest for hauling freight trains, while the E94 was quite common all the time in front of local trains.
There are many interesting train composition which were regular during these years. The 103 had very small local servce runs with 3 1920 DRG coaches. BR 150 hauled local trains with 1 or 2 silverfishes. The 140 was very common for local services too.
So be creative there
Anyways, great job for these guides! Let's just hope people read them carefully and start some nice networks.