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 car integration via USB port: Play music, control from car stereo
or steering wheel controls, charge. Supports advanced control and browsing by folders/playlists.
Requires Dashlinq Android Car Assistant App (free for GROM users), available at
Google Play Store For more information go to
Dashlinq pageUSB streaming for select Android devices is available without Dashlinq App.
You can stream the music and use track up and track down controls from any music application, while connected via USB. Check your device specs to make sure it supports USB streaming.
iPhone / iPod/ iPad USB 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 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 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:
Important Note: Volvo XC90 with High Performance or Premium sound systems are only supported stereos, with 6CD unit + amplifier + tuner.
Volvo XC90 with Basic Sound Stereo, Single CD, all in one unit is not supported yet.
Factory CD will have to be disabled to use the GROM-MST4.
For cars outside of USA, in some case if device is recognized and work properly but only for few seconds you will need to visit your
dealer and apply MOST Security OFF patch. This patch can be removed by the authorized dealer only. This patch will allow third party
integration devices to work properly with your factory stereo. Currently there is no workaround been found besides visiting the dealer.
For cars within USA, there are some rare cases, if the car was imported to the US, it might have MOST Security ON. No any Volvo dealer within US
has the ability to turn it off. In that case you can return the kit back to us within 30 days for the refund.
Usage video:
Install Video:
