This 6w passenger coach is modeled after the DB double-deck coaches.
The instructions uses the newest type of train wheels, but in theory every other wheelset (9V, RC) should work as well. It uses some more advanced techniques, so I wouldn’t recommend it to beginners.
The older, DR version with flat upper sidewalls is also available.
I haven’t testbuild this model in real life, if you decide to build it, feel free to confirm if it’s working as intended or report any issues. I suppose it is able of going through R40 curves, but I can’t guarantee that.
Partslist can be found on the last pages of the PDF-instructions.