i have an early 2002 a4 saloon with concert cd/radio and was wondering...
a)...can an auxilary input be bought for this head unit and routed somewhere at the front of the car (glovebox?) for an mp3 player to plug into?
b)...if so, where can i buy one. it would have to be a 3.5mm input socket

and lastly...c)...can they be easily fitted?

many thanks in anticipation.