Touchbox not responding?
 

Hi all! Recently my can has a fault code saying 'Touchbox not responding', as I understand this means my touch pad on iDrive nob is not working and it is not working. I found that there was a blue 4 pin connector behind the head unit was not connecting to anywhere. I guess this connector should be connected to head unit to make the touchbox to work. Any idea where this connector should be connected to? Thanks for help!