https://www.gtacarkits.com/product/wi...

How to install a kit that enables Wireless Apple CarPlay and AndroidAuto in Mercedes GL and ML 2012, 2013, 2014, 2015 and 2016 model years
The kit supports upgraded sound system for GL and ML.

List of Version 2 improvements:
- Wireless Android Auto is now supported
- no need for a separate microphone for Siri or Google Assistant, now works through the original car microphone