I think you’ll be better of rerouting the cable verses using ferrite cores. Can always add the ferrite cores later if need be. There is an 8M cable if you need a longer cable.I had some fun today with a 6m length of cord, plotting out different cabling routes between front and rear cameras for my soon-to-arrive A129 Duo. I should be able to run the cable down the A-pillar, along the bottom of the doors then up the C-pillar to the rear camera rather than through the head liner. I'm hoping by taking such a route it will not cause interference on the DAB signal. Or would it be worth investing in a ferrite core or two?
You'll probably get the most benefit by moving the rear camera and/or rear camera cable.
Turn WiFi off.