I enabled it somewhere in the config options for the MFD.
The second screen comes up when you cycle through the trips: globe icon, trip 1, trip 2, and then this speeding alert screen.
The long triangle means "long press of the button". So I can turn it on and off. A short press, for "Programme" goes to the third screen.
But the third screen doesn't seem to do anything. A long press for "MEM" just makes the screen disappear, the same as "Quit".
Has anybody ever seen this?! Is it something to do with cruise control? (I don't have cruise.)
I tried pressing "MEM" when the moron in front of me slowed to 25 for the 30 limit, but there was no warning when we eventually got back up to 30.
Will try to exceed 70 later.