Hopefully someone can point me in the right direction. I recently fitted a Rnse into my wifes A6. I've already done this in my A4 and all was well. All is well in the A6 but the reception occasionally drops out. Goes quiet ever 30 seconds. Scan shows the usual zf short to ground fault. I'm assuming the car won't have the correct amplifier? My A4 doesn't have a Fakra connection but the A6 has 2. Both connected. Can someone please advise if I need to get a new amplifier? It's a 2002 A6 1.9 TDI Avant btw.