I've got the kit and the decal sheet is quiet large.
The engine nacelles will most likely be gray judging by some Lufthansa artist drawings I've seen.
FYI, one item that really annoys me is the totally wrong shape of the wings. May be it is just my kit that has this issue. If not, it will take a bit of work to "bend" them into the correct shape.
Other than that, it is a nice and BIG model.