Infotainment System Component Locations

The infotainment system MMI includes the following: control modules, telephone, cellular telephone preparation, an external audio source connection, a DVD drive, the navigation system (with a hard drive disc) and a voice recognition system. All these are integrated in the Information Electronics Control Module 1 -J794-.

The Radio -R- /DVD Changer -R161- /TV Tuner -R78- and the Digital Sound System Control Module -J525- are connected via the MOST Bus. The basis sound systems are controlled directly by the Radio -R-.

MMI Maximum Equipment 

• The Information Electronics Control Module 1 -J794- in the instrument panel holds the CD player/DVD player/navigation system/Bluetooth car telephone/voice recognition system/SD memory card reader.
• Internal hard drive disc storage (HDD) for storing navigation data and MP3 files
• Multimedia System Control Head -E380- in the front of the center console
• Front Information Display Control Head -J685- (display) in center of the instrument panel
• DVD Changer -R161- (6G0) inside the glove compartment
• External Audio Source Connection -R199- (interface) inside 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/BOSE®/Bang & Olufsen® (9VD/8RY/8RF)
• Radio -R- inside the luggage compartment on the rear panel on the right side/in the left luggage compartment recess.
• The Digital Radio -R147- (QV3) is integrated in the Radio -R-
• TV Tuner -R78- (QU6/QU7) inside the luggage compartment on the rear panel on the left side/in the left luggage compartment recess
• Optional cell phone preparation (9ZF)
• Optional Bluetooth car phone (9ZW)
• Optional Bluetooth hands-free calling (9ZX)
• Optional multifunction steering wheel
• Voice recognition system

1. Multimedia System Control Head -E380- in the Front of the Center Console
2. Roof Antenna -R216-
3. Front Information Display Control Head -J685- in Center of the Instrument Panel
4. Roof Antenna -R216-
5. Microphone Unit in Front Roof Module -R164- (Left Front Microphone -R140-) in the Front Interior Lamp -W1-
6. Telephone Baseplate -R126- Inside the Center Console Storage Compartment
7. Information Electronics Control Module 1 -J794- Inside the Instrument Panel
8. MOST bus
9. FBAS wire
10. DVD Changer -R161- in the Glove Compartment
11. TV Tuner -R78- Inside the Luggage Compartment on the Rear Panel on the Left Side/in the Left Luggage Compartment Recess
12. External Audio Source Connection -R199- (interface) Inside the Center Console Storage Compartment
13. Radio -R- Inside the Luggage Compartment on the Rear Panel on the Right Side/in the Left Luggage Compartment Recess.
14. Digital Sound System Control Module -J525- Inside the Luggage Compartment on the Rear Panel on the Left Side
15. Data Bus On Board Diagnostic Interface -J533- Inside the Luggage Compartment on the Rear Panel on the Right Side
16. Microphone Unit in Front Roof Module -R164- (Right Front Microphone -R141-) in the Front Interior Lamp -W1-
17. Display Unit Button -E506- Inside the Instrument Panel

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", refer to Vehicle Diagnostic Tester.

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.

The front surface of the connectors must not be dirty.

If disconnecting the connectors: Attach Fiber-Optic Repair Set - Connector Protective CapsVAS6223/9.

When installing fiber optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink fiber optic cables.

Repairing fiber optic cables, refer to Fiber-Optic Cables, Repairing .