Had this lead poking through the centre console since I got my A3 and wondered what its for.
The chap I bought the car from said he thought it was an Ipod charger, but it has phonos on the stereo end etc?
Took out the stereo and this is how it is wired into the back. I assume its some kind of adapter to run an Ipod/Phone maybe?
Apologies its not that easy to see, but I didn't unplug anything!