Hi all - hope someone will help me out here, i have a 54 A3 sline 3 door, i bought a new phatnoise off ebay which i beleive is a vw one as the connector is rectangular(?). The changer cable i have is rectangular on the boot end which fits to the phatnoise nicely! - however the headunit end (headunit is concert stock!!) has a blue connector which can only be connected to the headunit by removing the rectagular block (which after having it fitted!! worked out this removes any sound to my rear speakers!) even when plugging in the blue end the phatnoise is not recognised at all. How the hell do you connect the phatnoise to the rectangular block which exists already? can you get a connector or do i just have the wrong cable or even wrong phatnoise?? Any help would be great as im not happy!!