MMi button combo for screen shot to SD card??

[Keef]

I use to do this on my old B8.5, handy for keeping track of issues for discussions with the dealers.
Worked when I had an SD card with available space inserted.

Had a google but can't find the answer, although I did find a site I had to translate suggesting you had to code/ unlock the ability to save the screen shot to an SD card.

Anyone help?
Cheers
Keef