Audi A4 Cabriolet 2004 - Concert II and Symphony II Radio Systems with BOSE Sound System (Sedan), Layout; 1 - Rear Window Antennas; 2 - Antenna Selection Control Module -J515-; 3 - BOSE Power Amplifier

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"Concert II" and "Symphony II" radio systems
with "BOSE sound system" (Sedan), layout
1 - Rear window antennas
2 - Antenna Selection Control Module -J515-
Under rear headliner trim
3 -
BOSE power amplifier
In right rear luggage compartment behind
side trim
4 - Front Bass Speakers
In lower front door trim
5 - Front Midrange Speakers
In upper front door trim
Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 - Communication