Hi all. I've seen a lot of posts on various issues people have with the Columbus units but I can't find a direct comparative for my issues. Hoping some of this will make sense to someone out there.

 

I bought a MK2 Superb estate, 2015, recently. Head unit is Bluetooth/Dab Columbus. Radio signal is intermittently sketchy asf when I'm driving. I had the unit out and all plugs are connected. Tested it with the cigarette lighter not connected in case of external electric interference (which I'd seen a lot of advice on) All fine.

 

Wondered if there's a loose connection around the aerial or something.

 

Been looking at connection settings and it showing dab aerial active and quality good. Which is what then lead me to possible connection in roof.

 

This messing weirdly seemed to give some stability in the signal when driving the other night. I put the rear window heater on, though, which cut out the signal. I had the aerial disconnected icon on dash, but signal screen was showing muted. So it appears, to me, to be electric interference from the somewhere.

 

Couple of days later I was listening to dab and the signal was fine. No interference.

 

Later that day, it was raining and the signal was sketchy asf again. Thought back to when I first discussed this and it was raining, heavily at times.

 

From reading lots of posts on here, I've come up with a few ideas:

 

Is there water ingress around the aerial? (No sign of leak on the roof liner) Is the dab aerial fitted in the rear column by the boot, so the heater coming on caused a short there?

 

Would fitting a separate DAB aerial be easier than trying to potentially repair the other (wired probably through the dash and mounted on the front window).

 

I've tried to contact a friend of a friend who's an auto electrical specialist, but he hasn't come back to me. Just trying to figure this out.

 

As a secondary matter, the Bluetooth doesn't connect to the head unit every time I switch the engine on, but appears to be connected via the heads up display. Only happened 2/3 times in 3 weeks. I wonder if the unit is having issues because of the other prevalent issue, so I'm trying to fix that before I look at this. I have purchased a dvd setup disc to try and reload firmware (if I need to).

 

Any advice please would be greatly received.

Anyone?

I've "resolved" this issue by fitting another DAB aerial to the front window. It currently isn't raining, so I can't test, but I can't think what else it would be.