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Media Interface Function - GF82.60-P-2020GW

Model 463 

as of model year 2013 up to model year 2017 

with code EH3 (Media interface) 

Function requirements for media interface, general 

Media interface, general 

The Media Interface function is also called a Universal Consumer Electronic Interface (UCI [UGS]). The Media Interface allows portable terminals to be connected to the COMAND controller unit (A40/3) using the respective adapter cable, the Media Interface electrical connector (X18/70), the media interface control unit (N125/1) and the Media Oriented System Transport (MOST).

Three different adapter cables are included ex-factory (in the glove compartment):

IMPORTANT The Media Interface electrical connector is located in the stowage compartment (telephone compartment) beneath the armrest. The AUX connection electrical connector (X39/45) installed as standard is omitted.

An AUX connection and two different USB interfaces are available for connecting the portable terminals. The USB interfaces support the following devices and standards:

IMPORTANT iPods are also connected via a USB interface.

IMPORTANT If an attempt is made to connect a USB memory stick using the adapter cable for USB devices, the following message appears on the Audio/COMAND display (A40/8):

NOTE: Please connect the device to the other USB port.

The USB electrical connector (X115) for connecting USB memory sticks is also located in the stowage compartment (telephone compartment) under the armrest.

Devices connected via a USB port (including iPods) can be operated with the following controls:

IMPORTANT The menu navigation and the graphical display of the menu navigation take place on the Audio/COMAND display and are dependent upon the respective connected portable terminal.

AUX devices must be operated on the device itself.

IMPORTANT With the "AUX" audio source, "Standard" and "Boost effect" can be selected in the "Volume" menu. The input level can be increased by selecting "Boost effect".

Cover art 

When playing pieces of music, the corresponding cover art is shown on the Audio/COMAND display if the cover art in question is stored in the portable terminal (e.g. iPod).

The maximum file size for processing cover art is 5 MB. The media interface control unit matches the resolution of 240 X 240 pixels, 16 bit colors and converts the file to the JPG format.

Media database 

Metadata is stored in the connected device in addition to the actual media files. This metadata is collected by the media interface control unit in a store, the media database. It is then possible to search for the relevant metadata in this store. Metadata includes, for example, the title, artist, composer, album, genre, audio book, podcast, file identifier, file type (audio or video).

The media interface control unit permanently stores the metadata of up to three devices. When one of these devices is reconnected, the metadata is updated. As soon as a fourth device is connected, the oldest set of metadata is overwritten.

Function sequence for media interface 

The media interface control unit is supplied with voltage via two direct lines (circuit 31 and circuit 30g). If a portable terminal is connected, it is recognized via the following route:

Adapter cable →

Media Interface electrical connector →

Media interface control unit

The Media Interface control unit then sends a signal to the COMAND controller unit, which changes to the connected source in the case of devices connected via a USB port (but not AUX devices). The user can have the audio data or video data displayed on the Audio/COMAND display by selecting the "Media interface" menu item as well as the specific submenu item ("Normal Track Sequence", "Track List Mix", "Medium Mix").

The "Media Interface" menu item and the specific submenu item can be selected using one of the following controls:

The control signals from the buttons of the COMAND control unit are processed internally.

The control signals from the Audio/COMAND control panel are forwarded via the telematics CAN (CAN A) to the COMAND controller unit.

The control signals of the multifunction steering wheel button groups are forwarded via the following route:

Steering wheel electronics (N135) →

Steering LIN (LIN E1) →

Steering column tube module control unit (N80) →

Chassis CAN 1 (CAN E1) →

Electronic ignition lock control unit (N73) →

Chassis CAN 2 (CAN E2) →

Instrument cluster (A1) →

Interior CAN (CAN B) →

COMAND control unit

The voice signals with operation over the VCS [SBS] are forwarded to the COMAND controller unit by the hands-free system microphone (A67b1).

After evaluation of the control signals in the COMAND controller unit, these are then forwarded via the following route by the COMAND controller unit:

MOST →

Media Interface control unit →

Media Interface electrical connector →

Adapter cable →

Portable terminal

The connected portable terminal evaluates the control signals and sends the corresponding audio signals and data to the COMAND controller unit via the reverse route.

On vehicles except code EU9 (Harman Kardon® Logic 7® surround sound system) the audio output takes place through the COMAND controller unit over direct lines via the speaker system.

On vehicles with code EU9 (Harman Kardon® Logic 7® surround sound system) the audio output is sent from the COMAND controller unit over Media Oriented System Transport (MOST), it is then amplified in the sound system amplifier control unit (N40/3) and forwarded over direct lines to the speaker system.

Video signals and data are forwarded directly by the Media Interface electrical connector to the COMAND controller unit via a coaxial cable.

The COMAND controller unit then processes the video signals and data internally and transmits them to the Audio/COMAND display over a low voltage differential signal (LVDS) line.

IMPORTANT Video files on iPods can be selected and played using the vehicle controls. Video-compatible devices connected via AUX must be operated on the device itself.

  Electrical function schematic for Media Interface function   PE82.85-P-2059-97ZGA
  Overview of system components, telematics   GF82.85-P-9999GW 
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