Works on my car. Need to have the key in position 2 for it to work as I recall. But one thing that's different on my car is that it will repeat the code/codes until you turn the ignition off. It doesn't stop after the code is displayed like that page says. So I don't need to re-do the test over and over again as it just cycles over and over again by itself.
But I also have a very, very late build E34. And it is a little different than most E34's.
Cosmos Black/Black 1995 540iA M-Sport
BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build