hello , after trying the 917 and 1971 code after pressing both phone and menu button to enter the diag screen , I would like to know if there is a list or a manual to explain what can be done via the screen and mostly what must not be done in order to avoid any problem

the menues are in english and my car speak french and all the usual information's ( nav , phone , radio ) are in french , maybe there is other code to enter french menu ?

I hope this can be interesting for other people to know how to use these menus

Thanks

Philippe

See attached.

Thanks for posting this.
I have been looking for a while for the "secret" menu.