Overview - Sound System

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Radio (CAN) Sound System Basic

One speaker in the left and right front doors
One loud speaker on the left and right side of the instrument panel

Fig 1: Identifying Sound System

Courtesy of AUDI OF AMERICA, LLC

Radio -R- in the Instrument Panel
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Instrument Panel
Left Front Mid-Bass Speaker -R101- /Right Front Mid-Bass Speaker -R102- at Bottom in Front Doors
CAN-Bus, Infotainment

Radio (CAN) Sound System Basic Plus

One speaker in the left and right front doors
One loud speaker on the left and right side of the instrument panel
Two speakers in the left and right rear doors

Fig 2: Identifying Radio CAN/MMI, Sound System Basic Plus

Courtesy of AUDI OF AMERICA, LLC

Radio -R- in the Instrument Panel
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Instrument Panel
Left Front Mid-Bass Speaker -R101- /Right Front Mid-Bass Speaker -R102- at Bottom in Front Doors
Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- at Top in Rear Doors
Left Rear Mid/Low Range Speaker -R159- /Right Rear Mid/Low Range Speaker -R160- at Bottom in Rear Doors
CAN-Bus, Infotainment

MMI sound system basic plus through 11/03/2008

One speaker in the left and right front doors
One loud speaker on the left and right side of the instrument panel
Two speakers in the left and right rear doors
Digital Sound System Control Module -J525-
External Audio Source Connection -R199-

Fig 3: Identifying MMI Sound System Basic Plus

Courtesy of AUDI OF AMERICA, LLC

Digital Sound System Control Module -J525- Behind the Luggage Compartment Left Side Trim
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Instrument Panel
Left Front Mid-Bass Speaker -R101- /Right Front Mid-Bass Speaker -R102- at Bottom in Front Doors
Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- at Top in Rear Doors
Left Rear Mid-Bass Range Speaker -R159- /Right Rear Mid-Bass Range Speaker -R160- at Bottom in Rear Doors
MOST Bus

MMI Sound System Basic From 11/03/2008

One speaker in the left and right front doors
One loud speaker on the left and right side of the instrument panel
Two speakers in the left and right rear doors

Radio (CAN)/MMI (through 11/03/2008), Standard Sound System

One speaker in the left and right front doors
One loud speaker on the left side, center and right side of the instrument panel
Two speakers in the left and right rear doors
Subwoofer in Rear Shelf -R157-, Sedan
Subwoofer in Rear Shelf -R157- in the spare tire well, Avant
Digital Sound System Control Module -J525-
External Audio Source Connection -R199-, MMI

Fig 4: Identifying Radio CAN/MMI Sound System

Courtesy of AUDI OF AMERICA, LLC

MOST Bus
Digital Sound System Control Module -J525- Behind the Luggage Compartment Left Side Trim
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Instrument Panel
Left Front Mid-Bass Speaker -R101- /Right Front Mid-Bass Speaker -R102- at Bottom in Front Doors
Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- at Top in Rear Doors
Left Rear Mid-Bass Range Speaker -R159- /Right Rear Mid-Bass Range Speaker -R160- at Bottom in Rear Doors
Center Mid/High Range Speaker -R158- in Center Instrument Panel
Subwoofer in Rear Shelf -R157-, Sedan
Subwoofer in Rear Shelf -R157- in the Spare Tire Well, Avant
Microphone Unit in Front Roof Module -R164- (Speech Recognition System Microphone -R206-) in the Front Interior Lamp -W1-, MOST Only
CAN-Bus, Infotainment

MMI Sound System Standard from 11/03/2008

One speaker in the left and right front doors
One loud speaker on the left side, center and right side of the instrument panel
Two speakers in the left and right rear doors
Subwoofer in Rear Shelf -R157-, Sedan
Subwoofer in Rear Shelf -R157- in the spare tire well, Avant

Fig 5: Identifying MMI Sound System Standard

Courtesy of AUDI OF AMERICA, LLC

Radio -R- Behind the Left Luggage Compartment Side Trim Panel
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Instrument Panel
Left Front Mid-Bass Speaker -R101- /Right Front Mid-Bass Speaker -R102- at Bottom in Front Doors
Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- at Top in Rear Doors
Left Rear Mid/Low Range Speaker -R159- /Right Rear Mid/Low Range Speaker -R160- at Bottom in Rear Doors
Center Mid/High Range Speaker -R158- in Center Instrument Panel
Subwoofer in Rear Shelf -R157-, Sedan
- Subwoofer in Rear Shelf -R157- in the Spare Tire Well, Avant
MOST Bus

Radio CAN/MMI Sound System Premium, Bang & Olufsen

One speaker in the left and right front doors
Per one loud speaker in the left and right triangular mirror
One loud speaker on the left side, center and right side of the instrument panel
Two speakers in the left and right rear doors
Two speakers on the left and right sides of the rear shelf, sedan
Two speakers in the left and right D-pillars, Avant
Subwoofer in Rear Shelf -R157-, Sedan
Subwoofer in Rear Shelf -R157- in the spare tire well, Avant
Digital Sound System Control Module -J525-
External Audio Source Connection -R199- through 11/03/2008

Fig 6: Identifying Radio CAN/MMI Sound System Premium Bang & Olufsen

Courtesy of AUDI OF AMERICA, LLC

Digital Sound System Control Module -J525- Behind the Luggage Compartment Left Side Trim
Left Front Treble Speaker -R20- /Right Front Treble Speaker -R22- in the Mirror Triangle
Left Front Midrange Speaker -R103- /Right Front Midrange Speaker -R104- in the Instrument Panel
Left Front Bass Speaker -R21- /Right Front Bass Speaker -R23- at Bottom in Front Doors
Left Rear Treble Speaker -R14- /Right Rear Treble Speaker -R16- at Top in Rear Doors
Left Rear Mid-Bass Range Speaker -R159- /Right Rear Mid-Bass Range Speaker -R160- at Bottom In Rear Doors
Left Rear Midrange Speaker -R105- /Right Rear Midrange Speaker -R106- in the Rear Shelf, Sedan
Left Rear Midrange Speaker -R105- /Right Rear Midrange Speaker -R106- in the D-Pillar, Avant
Center Mid/High Range Speaker -R158- in Center Instrument Panel
Subwoofer in Rear Shelf -R157-, Sedan
Subwoofer in Rear Shelf -R157- in the Spare Tire Well, Avant
Microphone Unit in Front Roof Module -R164- (Interior Microphone -R74- All/Speech Recognition System Microphone -R206- MMI through 11/03/2008) in the Front Interior Lamp -W1-
CAN-Bus, Infotainment
MOST Bus

Notes on MOST Bus

The optical Data bus "MOST bus" is used in addition to the CAN bus.

The connection to the other Data bus systems in the vehicle are provided by the Data Bus On Board Diagnostic Interface -J533-.

A fiber optic cable is utilized as the "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 disconnecting the connectors: Attach Fiber-Optic Repair Set - Connector Protective Caps VAS6223/9.

Fig 7: Fiber Optic Plier Repair Set VAS 6223

Courtesy of AUDI OF AMERICA, LLC

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 .