Hello,
This issue is really starting to bug me now. I should probably first start by saying its on an Alfa Brera and not a Coupe... however I wonder if anyone has had the issue on the coupe?

I have converted my headlights to HIDs. When I turn them on at night it interferes with the Radio rendering many of the stations un-listenable.

Would Ferrite beads/chokes help reduce the electrical interference? Would i put them on the cables coming from the HIDs?

Cheers

Mario

Sounds like an earthing problem either for the HIDs or the radio/aerial. Does the Brera have the same aerial as top 2 elements of the heated rear window and amplifier hiding in the C pillar somewhere? Are the HIDs a modern plug n play conversion at the headlight end or have you run a separate new fused supply? Does the radio have a good earth connection?

Not sure regarding the earths i will check.
The HIDs are the modern type, the same ones we use for the Coupe. I haven't run a separate fused supply for them.
The radio etc is all integrated from factory. Its only started doing it since fitting the HIDs.