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 USB car adapter kit connects USB 2.0 device such as flash drive, external hard drive
or mass storage device to the stock Audi A4 2009 stereo for music playback and integrated controls.
Control the music through factory Audi A4 2009 car stereo or steering wheel controls, see titles, browse by folders.Android car integration via USB port:
Play music, control from Audi A4 2009 car stereo
or steering wheel controls, charge. Supports advanced control and browsing by folders/playlists within Dashlinq app
plugins Spotify, Google Music, Web Radio, Pandora and Local (stored on the phone) music.
Requires Dashlinq Android Driving Assistant and Multimedia App (free for GROM users), available at Google Play Store
Works only with Dashlinq plugins. For more information go to Dashlinq page
iPhone / iPod/ iPad USB car integration:
Connect Apple device to the Audi A4 2009 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 Lightning connector cable. All iPod Touch, iPhone, iPad with Lightning style cable are compatible.
iPhone, iTouch, and iPad with 30-pin style cable are compatible.
(iPod video, iPod photo, iPod classic, iPod shuffle, iPod mini with 30-pin connectors are not compatible.) Bluetooth add-on (sold separately):
Make hands free phone calls (HFP), stream music from your smartphone to the Audi A4 2009 factory car stereo,
control music with the car stereo or steering wheel controls with
GROM Bluetooth Dongle
Android and iPhone smartphones and most music streaming apps are supported.
HD Radio Tuner add-on (sold separately):
Get HD FM Radio stations from your Audi A4 2009 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 to Audi A4 2009 car stereo 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
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.