I have a symphony 3 in my car and I didn't realise I could activate aux with vagcom. Anyway I went out and bought one with a box on it for £30 which was very good quality, bass' ect on par with the CD. now the cables started to break I found out you can buy a cheaper one thats directly into it as it's built in. I bought this one: Female 3.5mm AUX Audio Input Cable for Audi VW SKODA SEAT MP3 iPod iPhone Music | eBay I purchased a good quality aux cable to to plug into it and my phone. Anyway the aux quality is absolutely terrible, no bass at all even turned to the max, and its as though I can't hear anything.. Any ideas whats wrong? It looks like all the adapters are the same just three wires going into a plug.