Review on CHOOCL Bluetooth 5.0 aptX-HD Adapter for Audi AMI MMI 3g & Mercedes 30-Pin iPod iPhone Media Interface (1000) by Andy Metzger

Finally a HD Bluetooth adapter for my 2008 MB GL550. The audio is clear and crisp on my factory Harmon Kardon connected to the white 30 pin iPod cable. You may need to turn the volume up harder than other inputs like radio/CD, so be careful when switching between inputs, but it's still the best option for clear sound. The first time I was sent the wrong product which didn't work and I had to re-order to get the correct product. See image.