Citroen C3 2003 - Radio and multifunction display not working

[LeoBenz]

I have a Citroen C3 from the year 2003 with the 1.1 Engine.

Suddenly, the radio and multifunction display stopped working.

The radio still lights up when lights are on, but the display doesn't. To make things more confusing a few days ago, it suddenly started working again (MF Screen lit up and sound came from the radio), but after 30 seconds or so it went dead again.

Does anybody have the wiring diagram for this car? I am willing to take things apart, I just don't know where to start checking.

Thanks in advance for any help.

[GiveMeABreak]

Just remove the head unit and check the connections - especially the quadlock connections within. It's likely one of the wires or pins is loose causing the intermittent operation. Ditto for the connection to the MFD.