Help connecting aux-in adapter

[pudding]

Hi all,

Ive got an 04 A3 with CD playing Concert radio (does that make it a concert II? )

Ive bought one of these Connect2 CTVADX001:

http://shop.audioimages.co.uk/connects-2-ctvadx001...

Having a little trouble connecting it. Have the radio out and have connected the iso plugs up, but there is a single black wire from the small silver Connects2 box connector that I dont know what to do with? I assume its important and required, as when I turn the radio back on, the cd button on the radio just brings up 'No CD' message.

Any help with this?

Thanks.

[mugs]

Not sure if this'll help, but I fitted one of the connects2 boxes to my Fabia recently. Does the black wire have a short length stripped of insulation near it's end? if so then it's the earth wire and will need screwed down to something metal to make ground - I used the stereo cage.

Also, on my stereo when I pressed the CD button it didn't change to AUX input, I had to press '1' on the stereo after selecting CD, that moved it from the internal slot CD to the external device, then it worked no problem.

Sorry if that's no help to you, but hopefully it'll shed some light.

[Silverbullet767]

According to this, it goes 'somewhere'

http://www.connects2.co.uk/Instructions/C2_Aux_OEM...

Is there a black wire coming from the radio?