Where do the buttons next to 17 take you?

The more I look at this chaotic car panel, the more I find wrong with it. There seems to have once been an attempt to organize the buttons logically, but that time seems to be long gone. I wish I knew more about the location and history of this building. Besides the question in the title, a few others I’d like answered is, “How many new floors were built over the years?” “Was it that much trouble to renumber them?” and “How short are the push button wires?”