Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Overview - Navigation System
MMI Navigation Plus, I8T+7UG
- Information Electronics Control Module 1 -J794- behind the glove compartment
- Front Information Display Control Head -J685-, 10.1 inch display in the center of the instrument panel
- Front Information Display Control Head 2 -J1060-, 8.6 inch display in the front center console
- Instrument Cluster Control Module -J285-, display in the instrument cluster, Audi virtual cockpit, 9S8
- USB Distributor -R293- in the front center console storage compartment, two USB ports for data and charging, UF7
- DVD Player -R7- in glove compartment, 7D5
- Radio -R- integrated in the Information Electronics Control Module 1 -J794-
- Sound system: standard sound system, 9VD
- Video input for rearview camera system, KA2
- Bluetooth Hands-Free Calling, 9ZX
- Wi-Fi hotspot, EL3
- Voice recognition system, QH1
Optional
- Digital Radio -R147- integrated in the Information Electronics Control Module 1 -J794-, only ECE and QV3
- Radio System, Satellite - R146- integrated in the Information Electronics Control Module 1 - J794-, only North America and QV3
- USB Distributor -R293- in the front center console storage compartment, 2 USB ports, SIM card, SD card, UF7/IU1
- TV Tuner -R78- in the right rear of the luggage compartment, QU1/QV1
- Digital Sound System Control Module -J525- on the left rear side of the luggage compartment, 9VS/8RF only
- Sound system: premium sound system, 9VS
- Sound system: advanced sound system, 8RF
- Audi phone box light, 9ZV
- Audi phone box, 9ZE
- Multifunction Steering Wheel
ASI - Audi Smartphone Interface
- Instrument Cluster Control Module -J285-, Audi virtual cockpit
- Front Information Display Control Head -J685- in center of the instrument panel
- DVD Player -R7- in glove compartment
- Front Information Display Control Head 2 -J1060-, in the front center console
- USB Distributor -R293- in the front center console storage compartment
- Mobile Device Charger 1 -J1146-, phone box, in the front center console storage compartment
- Information Electronics Control Module 1 -J794- behind the glove compartment
- TV Tuner -R78- in the right rear of the luggage compartment
- Digital Sound System Control Module -J525- in luggage compartment on left rear side
Fault Finding is performed using the "Guided Fault Finding" on the Vehicle Diagnostic Tester.
Repairing Antenna Wires
Notes on MOST bus
The optical data bus "MOST bus" is used in addition to the CAN bus.
A fiber-optic cable is used. Fiber optic cables are routed inside corrugated tubes for protection.
Replace the complete fiber-optic cable if possible.
The front surfaces of the connectors must not get dirty.
If disconnecting the connectors: Attach the Fiber-Optic Repair Set - Connector Protective Caps: VAS6223/9 .
When routing fiber-optic cables, make sure not to go below the minimum bending radius of 25 mm. Do not crush or kink the fiber-optic cables.
Fiber-optic cable repair. Refer to FIBER-OPTIC CABLES, REPAIRING .
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.