Mine just came today, with Harry Hieke's masterful medium weathering arranged through Mr. Muffin's Trains.
I see an SMD type LED in the roof of the cab, but it does not come on while the locomotive is in the stationary position. Is there a trick to get it to work?


Nice question Bob. I never even noticed it. I'll have to check mine again.
You may have to toggle rule 17 lighting ON with the Cab-2; not sure.
Nice weathering job by the way; I like it a lot. 
Rod