got myself a clean 54 plate Mondeo as a hack while my A4 is undergoing its turbo swap. It has the 6000cd deck with steering wheel controls and a button for phone. Would like to have the phone function but assume it needs an additional module? Is there a way I can add an aux input? Found a 3.5mm jack but would like to operate the device via the car controls rather than have the mp3 player on the dash.

Any help gratefully received.