Carfanatic(Darren)

Hey,

Havin a little problem with the radio in my friends B5 A4, we had a problem with water leakin in the C pillars and now the FM radio gets mostly static, we took the head liner down and found a bright orange box that seems to control the FM antenna, is there any way to test to box to see if it is workin properly? is there any way we can substitute anything in the place of it?

Thanks