This adapter is top! It is fully compatible with the system comand APS 50 of my class W204 C280 2007. For less than 30 euros, I can now enjoy dozens of albums transferred from the SD card 16gb included with the adapter. The class audio system recognizes c folders on the SD card, the name of albums, and titles. You simply ensure that the securities end with .mp3 I would highly recommend this adapter. Perfect and reliable delivery with UPS (within 24 hours) Chronopost and TNT are absolutely not the height. They claim to have presented or have deposited the parcel relay point, which in my case was false. Very angry against these two carriers.