Double compare the adapter interface with your car original port mount,when the function is not working, please try to restart your cell phone, that will help | Plug the adapter into the media interface port in your car and pair it with your Android, iPhone, iPad or iPod touch via Bluetooth | For bluetooth mode, you could only change songs from the smartphone, can not control over music from the iDrive system , the playlist will not be displayed on the car screen | For USB mode, you could charge your device, or use the USB function to listen music (listen music: the Disk must be FAT32 format and *.mp3 file , notice that few MMI system don't support USB function) | Compatibility: Mercedes A (Not A4) /B/C/E/S/GL/ML/SL/CLS/SLK Class (From 2009 ~ Onwards)

Just plug it into the USB / AUX IN port in your car and pair it with your Android, iPhone, iPad or iPod touch via Bluetooth | For bluetooth mode, you can only change songs from the smartphone, can not control over music from the iDrive system , the playlist will not be displayed on the car screen | For USB mode, you could charge your device or use the USB function to listen music (listen music: the Disk must be FAT32 format and *.mp3 file , note that few MMI system don't support USB function) | Vehicle compatibility: BMW 1/3/5/6/7 series (2004~2016) and BMW X1 X3 X5 X6 Z4 (2006~2013) and Mini Cooper R55, R56, R57 (2007~2016), also for vehicles with USB/Audio interface (option S6FLA) | Notice: NOT compatible iDrive, this adapter fits BMW and MINI cooper models with AUX IN and USB ports and BMW's without an in dash navigation system/screen