Do you get any DAB issues going the low road route? I've gone the headlining route, and used Ferrites. I can get radio 1 but not Kiss FM. I've been using a radio app on my phone via BT to work round the issue but it's not ideal.The problem with going the headlining route is you have to be sure to run the wire BEHIND the airbags!!
I went the low road and ran the wire under the door treadplates.
Sent from my Nexus 10 and a Black XF-S