In the settings there's a Expert Mode On or Off selection does this mean that the doors doesn't open in your hud and you ain't got through the procedure of data thingy.
No at the minute i would think that setting will only be for the German expert loco, which I can't think of the name of, off the the top of my head.
BR 101 Expert. When the expert option is ON you start with safety systems on, random loco faults on and you need to make all the adjustments for your run. When expert mode is OFF you start with safety systems off, random faults off and the loco behaves similar to any other non-expert loco in the game.