tomtom70

And I just found the spare part from the last installation (2007?), God I'm a hoarder ... Just to confirm it comes as this from Ford's (mine was still in the sealed bag).

As guessed before, you opened the hole for the passenger airbag deactivation switch.

Pictures? There is a larger cut-out for the passenger airbag deactivation switch.

When I did this retrofit on a Focus a while back, I had to open a round cut-out for the socket to slide in.

Why would you connect a camera to an aerial input?? Of cause you need the unit with the correct inputs. The one without the video Fakra does not have any means to connect an external video device.

1) No (even not knowing what you might think "the ECU" ist - that is a generic term for any Electronic Control Unit in the vehicle, and there must be more than 20 in yours). Can you set the clock on the cluster with the OEM radio gone? If not, you may need to disconnect the battery once to let the modules (ECUs) relearn the vehicle configuration without the original radio.

2) No idea - what ever does one get directly at the Ford dealer?

3) No