-- 1999 - 2000 - 2001 - 2002 - 2003 -- Audi A6, S6 & Allroad AM FM Audi Symphony Bose Radio CD Player with Bluetooth Upgrade Part Number: 4B0035195A Reference Number: CQ-LA1811L This is for a Audi A6, S6 and Allroad AM FM Audi Symphony Bose Radio CD Player with Bluetooth upgrade. This radio that has been professionally remanufactured, cleaned, and serviced as needed and thoroughly checked. The radio's appearance is great, as pictured, and is in 100% working order. This radio is being sold as a REPLACEMENT ONLY! The part number for this radio is 4B0035195A. If you do not have this exact part number currently in your vehicle it will likely NOT WORK. If you are unsure of your part number give us a call with your VIN and we should be able to provide you with the correct part number. They may look the same and have the same plugs but data streams may be different not allowing them to code. For example external amps are used in some cars and will not allow interchange etc. The Bluetooth upgrade is simple to operate! Just pair the device, press the Bluetooth button and play your music or most in-app audio, including iTunes, Rhapsody, Pandora, Spotify, YouTube, Netflix and many, many more will play in full, crisp, clean quality while taking advantage of all sound controls on the radio. To complete paring, some devices require a pass key or code which is "0000." Please note: that this will not work with phone calls as phone manufacturers have designed calls to work with Bluetooth mic systems only. When you do not want to listen to Bluetooth music, simply unpair or turn off your device's Bluetooth.