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ASC Car Stereo Install Dash Kit, Wire Harness, Antenna Adapter, and Radio Removal Tool for Installing an Aftermarket Single Din Radio for 1996-1999 Audi A4 A6 A8 and 2000-2006 Audi TT Vehicles -
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Auto Radio Fascia Panel Für Audi A4 (B6) 2000-2006 ; A4 (B7) 2004-2009 Facia Plate Dash Kit Installieren Lünette Trim Adapter günstig kaufen — Preis, kostenloser Versand, echte Bewertungen mit Fotos — Joom
Installed an Android head unit in B6 Avant, along with an after market backup camera. I really like it so far, the backup cam and head unit look close to OEM. :
Audizine Forums
Amazon.com: Aftermarket Radio Stereo Installation Double Din Dash Kit Mount Trim Bezel Compatible with Audi A4 and RS4 Select Models with Bose System : Electronics
a4mods.com :: - The Premiere Audi A4 Modification Guide and Pictures Library