found a way to use your steering wheel remote with aftermarket radio.
 

Hi all,
I do not have and A6 but in my search to find a remote that can be used on my TT's concert radio I found this. If anyone has any info on the A6's remote that they would like to share in return it would be greatly appreciated!!!

Thanks,
dave<ul><li><a href="http://peripheralelectronics.com/periph_products/steering_interface.htm">OEM Steering Wheel Remote Interface</a></li></ul>