(04 Feb 2015, 8:35 pm)Andreos1 wrote The dashboard layout of a bus and associated buttons/controls can differ per model. Even slightly.
I believe some operators issue booklets these days, with a photo of the dash and labels.
Don't know about booklets, but I know there's a large number of GNE buses that have a photo of the dash which is labelled stuck up somewhere in the cab for drivers to see.