The kit works for Audi MMi High 2G stereos with MP3 support and MMI Software version 33.6.0 and newer. Please read this document (.pdf) about how you can check the software version of your stereo MMI. If your MMI software is older than 33.6.0, you can update it with your local Audi dealer.

USB Connection: GROM-MST4 car stereo adapter connects your USB 2.0 device such as flash drive, external hard drive or mass storage device to the stock stereo in your car. You can control the playback through your car stereo or steering wheel controls.

Android integration via USB port that supports advanced control and browsing requires DashLinQ Android Car Mode Dashboard App, available at Google Play Store For more information go to DashLinQ page

USB streaming for select with Jelly Bean and up software is available without DashLinQ. You can stream the music and use track up and track down controls from any music application, while connected via USB. 

iPod, iPhone, iPad car integration: Connect your Apple device to the factory car stereo via USB port. Play music, control from car stereo or steering wheel, and charge at the same time. Use standard USB to Apple connector cable (including Lightning style). All iPod, iPhone, iPad are compatible, invcluding latest iPhone 6 and iPhone 6 Plus.

Bluetooth add-on (sold separately): Make a hands free phone calls (HFP), stream music from your phone to the factory stereo via Bluetooth Audio playback (A2DP), control your music with the car stereo or steering wheel controls via Bluetooth wireless audio control (AVRCP) with the GROM Bluetooth Dongle 

HD Radio Tuner add-on (sold separately): Get HD FM Radio stations from your factory stereo. GROM-HDR1 HD Radio tuner improves the sound quality of local FM stations and delivers clear and bold sound. Adds access to the HD FM sub-stations for more music choices. Check out the HD Radio Tuner and Antenna Dongle 

Aux 3.5mm phone jack connection for any additional audio source such as DVD, MP3 player, XM and more. Available with plus 5V charging option via AUX-In 3.5mm and 5V USB charging cable 

Connection Diagram:


Folder, playlists browsing is supported for Android phone and USB stick.
Important Installation Notes: Please check that the CD Changer function is activated on your factory stereo. If it is not activated - you will need to contact dealer and ask to activate the CD changer function.

Specs:

- GROM-MST4 Multimedia Box
- Optical harness
- Automotive grade USB Type A Male / Type A Female 3FT cable
- Install and Operation Manuals

Optional Add-Ons (sold separately):
- GROM Bluetooth Dongle for hands free calling and wireless playback
- AUX 3.5mm phone jack cable for any MP3 player, mobile phone, XM, etc.

Package Includes:

Standard package include:
- Car stereo adapter in metal enclosure
- Vehicle specific harness
- Automotive grade USB Type A Male / Type A Female 3FT cable
- Operation manual

Optional accessories (purchase separately):
- GROM Bluetooth Dongle for hands free calling and wireless playback (GROM-BTD)
- HD Radio Tuner for digital HD Radio FM Stations (GROM-HDR1)
- AUX 3.5mm cable for any MP3 player, mobile phone, XM, etc. (35USB) 

GROM-MST4 Manual
Compatibility Guide
Check for recent firmware updates
GROM for AUDI fiber-optic usage manual