Hello all, just found this forum and signed up. Quick question - I recently bought a 96 D1 SD, alas one or more of the original owner's 7 kids absconded with the manual, and the only button I haven't been able to ID is on the console near the clock; it looks like a highway with an overpass. I've seen similar buttons while riding tour coaches in the UK, but haven't been able to figure out what it does, so I'd be quite grateful if someone could please explain. Thanks much!