Left hand rear side compartment towards the top. The compartment where the blue tooth module would be located.
If your system is as dumbed down as mine there is no separate amp. Just the head unit driving the speakers.
VW Touareg V6 TDI 4Motion with a smooth as AISIN 8 speed auto gearbox that WORKS!
X3 3.0d 2006 (MY07) sold