I recently bought a 2003 A4 Avant 2.5TDI Quattro. Every time I switch on my headlights the radio throws one. Lot's of interference. It's ok on sidelights. The previous owner has fitted Xenon bulbs and I wonder if that's causing an issue.
Can anyone advise?
many thanks in advance...

 

Chances are the ballasts from the HID lights installed are causing radio interference. If you Google that you might be able to find more information.

Unfortunately I haven't experienced anything like that.

Jason