Good morning fellow A2 peeps. I have recently fitted a Sony head unit with steering column mounted remote, which is really useful. However there is interference from the rear speakers, only when the engine is running. It's very annoying as the rear offside tweeter is quite close to my ear, so for now I have disconnected the plug in the wiring adapter I bought, that serves the rear speakers. all works fine apart from this. Any advice would be appreciated, as I'm missing the surround effect of having the rear speakers. The adapter I have used is shown in the attached photo. I hope it's the correct one. My car doesn't have Bose.