MMI Infotainment System From 11.03.2008
MMI Infotainment System from 11.03.2008
The MMI from 11.03.2008 an advancement of the MMI currently in use. The cell phone preparation, external audio source connection, CD and DVD drives, navigation (with hard disc drive) and voice recognition system are integrated all together in one unit, the information electronics control module 1 (J794).
The radio/CD changer and digital sound system control module (J525) are connected via the MOST Bus. The basis sound systems are controlled directly by the radio. The satellite radio (R146) (SDARS) is optionally integrated in the radio.
MMI maximum equipment
• The information electronics control module 1 (J794) inside the instrument panel at the top contains the CD player/DVD player/navigation system/cellular telephone preparation/voice control system/SD memory card reader
• Internal hard drive disc storage (HD) for storing navigation data and MP3 files
• Multimedia control head (E380) in the center console
• Front information display control head (J685) in center of the instrument panel
• The CD changer (R41) /optional external audio source connection (R199) (interface) in the glove compartment
• External audio source connection (R199) (AUX IN socket) in the center console storage compartment
• Digital sound system control module (J525) in the luggage compartment (on the left side, in the rear)
• Sound system: Standard/Bang & Olufsen
• Radio (R) on the left side of the luggage compartment in the rear is optional with satellite radio (R146)
• Optional multifunction steering wheel
• Optional Bluetooth hands-free equipment
• WLAN (from MY 13)
The MOST bus performs the system data exchange in the MMI.
The connection to the other Data bus systems in the vehicle are provided by the data bus on board diagnostic interface (J533).
Fault finding is performed via "Guided Fault Finding" using the Vehicle Diagnostic Tester.
Information electronics control module 1 (J794) overview
information electronics control module 1 (J794) is a 3rd generation MMI. Depending on the equipment level, the Information Electronics Control Module 1 contains the following known control modules from the 2nd generation:
1 Front Information Display Control Head Control Module (J523)
2 CD Player (R89)
3 Navigation System With CD Drive Control Module (J401)
4 Card Reader (Telephone) (R115) /SD memory card reader
5 Speech Input Control Module (J507)
6 Not installed
7 Telephone Transceiver (R36) (cell phone preparation)
8 Internal Hard Drive (HD) Disc Storage
9 Information Electronics Control Module 1 (J794)
Radio (R) overview
Depending on the equipment level, the radio contains the following known 2nd generation control modules:
1 Digital Sound System Control Module (J525)
2 Radio
3 Radio AM/FM tuner
4 Satellite Radio (R146)
5 Not installed
MOST bus Overview
1 Front Information Display Control Head (J685)
2 Information Electronics Control Module 1 (J794)
3 MOST bus
4 CD Changer (R41)
5 Not installed
6 Radio (R)
7 Digital Sound System Control Module (J525)
8 Data Bus On Board Diagnostic Interface (J533)
9 Multimedia System Control Head (E380)
Notes on MOST bus
The optical Data bus "MOST bus" is used in addition to the CAN bus.
A fiber-optic cable is used as a "connecting cable". Fiber optic cables are routed inside corrugated tubes for protection.
Replace complete fiber optic cable if possible.
Make sure that the face surfaces of the connectors do not become soiled.
If the connectors are disconnected: install the protective cap for cable connector (VAS 6223/9).
When installing fiber optic cables, make sure not to go below the minimum bending radius of 25 mm (1 in.). Do not crush or kink fiber optic cables.