To remove the Audi Symphony I headunit. Insert the four radio removal tools as shown. Cover the top of the climate control unit with painter’s tapeto prevent accidental scratches while removing and installing the radio. Pull the headunit straight out without pulling on the radio removal tools. If necessary, push the radio out from behind by reaching around under the driver’s side dash in the area revealed by removing the knee panel. Alternatively, place as many fingers as possible in the cassette slot, wiggle and pull. Once the radio is out, unplug the four wiring harnesses, the two antenna connectors, and the brown single wire connector. Remove the radio keys from the face by pressing in the locking tab and pulling the key straight out. This is illustrated in the picture to the right.

Audi Symphony I pinout

Differences between the Volkswagen RCD 210, RCD 310, RNS 310, RNS 315, RCD 510, RNS 510, RCD 550, RNS 810 and the RNS 850