Yes, everything else still works. Once you press any button the display and functions operate as usual.
Update: I went into the diagnostic menu under the options button (headlights on off 5 times) and cleared some faults that were logged in there. Not sure what the faults were as they are all Hex codes. Anyway this has stopped the message from appearing. The car was right all along! 'CHECK THE SYSTEM' I checked the system, cleared the logged faults, all is good. As to what the faults were, I will worry about them another day.