Incredible Detail

[Sternjaeger II]

ok, so I was right about the number of pages, circa 200 with covers and all.

As for the generator, I am still reading through it, the manual is a bit confusing (there's SO much information), but I can tell you that apparently the external one was the main generator, not an emergency one. The emergency one was actually connected to the compressor inside the plane, which normally is used for the startup (the system using compressed air).
Another interesting aspect is that the turrets were hydraulic, which means that if your system got damaged, you had no means of moving them around (!!!)

The landing gear system is hydraulic too, but it's another circuit and I'm trying to understand where the thing was fed from, there was a manual gear lever system though.

Apparently the plane also had a heating system for the cabin, and the rear main door could be jettisoned before abandoning the plane.