[1] German only: https://de.wikipedia.org/wiki/Park_am_Gleisdreieck
[1] German only: https://de.wikipedia.org/wiki/Park_am_Gleisdreieck
I was a British Army brat and we were stationed in Rheindahlen near MG at the time. The Berlin Corridor was pretty grim. It was a long straight concrete road with barbed wire fences on both sides. At the Berlin end we parked up in a large concrete plaza and presented passports through a metal hatch. Then we were allowed into the city. Berlin in 1980. I really wish I was older and could give a better impression of the place at the time but there are probably plenty of writers who can do the same and far better. It seemed to me at the time to be the same as any other (West) German city but a bit bigger! I think we were allowed a short trip to the East side via CP Charlie.
The Berlin I visited back then had bigger fish to fry than a contentious autobahn!