I hadn’t done anything stupid or careless. I’d merely closed the trunk of my 1987 BMW 535i to pull some tools out of it. The car, which I’ve been driving frequently since I pulled its head and replaced its broken rocker arm this fall, was sitting in my locked garage, so the keys were in it, as is my custom. But, for reasons unclear, when I gave the trunk lid a good firm close, I was greeted by a noise I certainly did not want to hear: GSHWACK, the unmistakable sound of the central locking system engaging.
This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2019/01/28/unlock-your-car-with-string