Recently I set out to add an aux adapter to my concert 2+ and without relying on an expensive ross tech cable here is a solution:
This is for the quad lock radios:
You will need:
Stereo Removal Keys
I used: http://www.ebay.co.uk/itm/2607858006...84.m1497.l2649
Connects 2: CT29AU04
http://www.ebay.co.uk/itm/1504567388...84.m1497.l2649 as it came with the adapter to mini jack
VAG K+CAN Diagnostic Cable:
Got to love ebay for a bargain
Now once you have connected up all the cables which are very straight forward, you will need to reprogram your radio.
Fire up "VAG-K+CAN COMMANDER FULL 1.4" which comes with the adapter or if you have another adapter just post and I can post the software on here.
Under Target select "82 FM-Tuner / Radio" and press "Open Channel"
Now your radio should be displaying "DIAG" which means everything has gone well.
Next you need to actually reprogram it thankfully there is an easy way to work out the code if you go on http://wiki.ross-tech.com/wiki/index...ration_II_Plus
You need to go through each option filling out the number so for example you would start with 0xx0xxx
Then if you want to enable aux with you do it becomes 01x0xxx then fill in option 2 so for me i had none of the equipment so it became 010, the next digit is already 0 so you skip over it and look at the next option which in my case i have a diesel engine so the code is now 01002, now you carry on this process until you have finished all the options in the end for me it was 0100201.
Now enter this into the value(HEX) box and press "Coding" and if everything has gone it should say it’s done it.
Here is a picture of the software for reference:
Standard with the cheap cables.
Now close the channel wait for your radio to reboot hit CD twice and hey presto you now have aux input, enjoy
Hope this is all clear any questions ask away. It's a cheap solution but it works cost me around £35 all together but for the decent audio quality it's definitely worth it.