Compatibility: The product supports music transmission, bluetooth version 2.0, 3.0, 4.0, 5.0. Match your phone or other devices to bluetooth module. Choose Aux from your radio, then you can use your phone to play music through car speakers. Fitment: for Mercedes Benz A-Class W169 06/08-08/12, for Mercedes Benz A-Class C169 06/08-08/12, for Mercedes Benz B-Class W246 11/11-10/14 NTG4.5, for Mercedes Benz B-Class W245 06/08-10/11 NTG2.5, for Mercedes Benz C-Class W204 03/07-2009 2011-02/14, for Mercedes Benz C-Class S204 12/07-08/14, for Mercedes Benz C-Class C204 06/11-11/15, for Mercedes Benz E-Class A207 03/10-04/13, for Mercedes Benz E-Class S212 11/09-03/13. Installation: Put the plug into the MMI port. Please confirm your car have MMI Interface, it is a rectangular socket hole. Activate the AUX mode in the MMI system of your vehicle and pair it with your devices via bluetooth to play music. Note: It did not fit a HIM port. Quality Material: Made of quality metal and plastic material, durable and practical to use. Package Includes: 1 x Car Bluetooth Adapter. Please confirm it is MMI audio input port. Not fit for Mereds-Benz MHI port. Not fit for Mercde-Benz 30 pin port. Note: The adpter 1.does not support simultaneous charging via USB and streaming of music. 2.does not with volume control unit button. 3.dose not support change songs from the iDrive system/ steering wheel. 4.the playlist will not be displayed on the car screen. 5.a little part cell phone need update a new soft version to compatibility this adapter (Audio was modification may be will not work with this adapter).