Check the listing for details. CTAADUSB004 Audi A2 USB adaptor interface car AUX SD input MP3 jack 2003 onwards. Condition: New, Made in United Kingdom. Listed at 128.70 USD. This Audi in-car USB adapter interface is compatible with the Audi A2 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 can ONLY be connected via 3.5mm AUX). IMPORTANT: This adapter requires an external CD changer input. Some newer models that have an internal CD changer do not support the connection of an external CD changer. Please ensure that your radio is capable of running an external CD changer before orderi.