Check the listing for details. Audi A3 USB adapter interface CTAADUSB003 car AUX SD input MP3 jack 1996 - 2005. Condition: New. Listed at 129.84 USD. This Audi in-car USB adapter interface is compatible with the Audi A3 and plugs directly into the back of your original Audi car stereo (see compatibility information below). This Audi USB adapter allows you to connect almost any portable audio device: USB hard-disc, USB flash-drive pen, iPod, iPhone or iPad (via 3.5mm jack only), Mini-Disc player (via 3.5mm jack), CD player (via 3.5mm jack), MP3 player (USB or 3.5mm jack), Mobile phone music player (via 3.5mm jack), SD and MMC cards. (iPod/iPhone/mobiles can ONLY be connected via 3.5mm AUX, NOT USB). Please note: The compatibility information provided for this Audi USB adapter interface is provided as a guide only. Please ensure that the make, model and year of your vehicle matches the above and that your car has the suitable connector to.