Secret (or not) Diagnosis Mode

[Larz]

There is a way to access / adjust / review many of the settings in the older M's. Here is a video that walks you through it:

[midnightclub619]

Thanks for this!! I'm going to try it out later.

[FlawleZ]

Thanks for sharing this. I heard about it long ago but didn't see any other documentation on how to to enter it.

[szh]

The mechanisms to do basic diagnosis menus are described in the Service Manuals ... see the link to them in my signature!

Z