Features: 1.Just plug the 12pin connector into the socket back of your radio, convenient to use. 2.You can just insert this adapter to the back radio, then connect the red wire to 12V+, the black wire to 12V?. 3.Match your phone or pad to bluetooth module, and choose Aux from your radio, then you can use your phone to play music through car speakers. 4.Allows you to hear music from your phone/pad/MP3 (They should have blueooth function). 5.Practical accessory completely fit for Mercedes CL?Class 2004?2006. Specification: Condition: 100% Brand New Item Type: Bluetooth Audio Adapter Material: ABS Color: Black Fitment: Fit for Audio20, Audio50 APS, Fit for Comand APS (only NTG2) Fit for A-W169, B-W245 C-W203 & W209 CLK 04/04 ~ M-W164, GL X164, R-W251 with Audio20, Audio50APS, Comand APS Fit for Mercedes A-Class W169 Fit for Mercedes B-Class W245 Fit for Mercedes C-Class W203 Fit for Mercedes CLK-Class W209 Fit for Mercedes GL-Class X164 Fit for Mercedes M-Class W164 Fit for Mercedes R-Class W251 Fit for Mercedes S-Class W221 Fit for Mercedes SL-Class R230 Fit for Mercedes CL-Class (2004-2006)