Audi A3 2001 Y Reg Original Stereo?

[Brooksy]

Hi, my mate has a 1.8t Q A3 8L but comes with an after market stereo he wants to put in an original stereo that came with it. How would I tell what one if there is a difference. Didn't come with any stereo manuals just usual user manual for the car..

thanks

 

[AndyMac]

Should be a Concert II (cd player) single DIN or Symphony II double DIN