I have looked high and low and I can't find one? I am sure there must be a saloon light for the real Javalin?
I guess you could turn off the lights by shutting the train down. But then that means you can't drive the train.
I think even with the master key out, the passenger lights are still on. I have had to do an empty move with the Javalin, be nice to be able to turn off the lights as it is out of service.
If the switch isn't on the back wall, it's probably hidden in the screen on the left where the clock is. DTG haven't made that screen interactable. I don't have any 395 knowledge, so don't know where that switch is in real life, but if the ICE3s from Germany are anything to go by, then it'll be in the screen on the left.
Yeah, I think you might be right about the saloon lights being accessable via the left screen, it is or was the same for the class 375 and 377, but access those screens now. Another one of DTG life improvements, can zoom the screen, just can't do anything with it beyond that.