Aux and COMAND issue

I have searched and not found the same issue as this.

Last week my AUX in stopped working, or so i thought....

Basically i can't select AUX on the menu as the button doesn't respond.
Also there are other buttons that don't respond either.

The 'Right' select button that toggles through CDs on the changer
The Settings button in the SERV menu

Anyone had this?

I have disconnected the battery and left it off for an hour - Nothing no difference.

I am scratching my head other than the head unit has faulty buttons