Removing and installing navigation system with CD drive control unit J401, MMI (up to week 35/08) — AUDI

🧭 Before you start

Fits: Audi A6 C6 (4F, 2004–2011)

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• Insert two radio release tools T10057 into slots on navigation system with CD drive control unit J401 until they engage. Pointed ends of grips must face outwards.

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Switch off all electrical equipment.
2. Remove ignition key.
3. When renewing control unit, select "“Replacement”" function for appropriate control unit in "“Guided Fault Finding”".
4. Open left-side luggage compartment storage area.
5. Remove luggage compartment side trim (left-side) General body repairs, interior70.

6. Unscrew the nuts (2) and (4) (5 Nm) and bolt (1) (5 Nm) on the infotainment rack (3). — 5 Nm (3.7 lb-ft)
7. Unplug any connectors on the control units that are in the way.
8. Pivot the rack into the luggage compartment until the connectors for the navigation system with CD drive control unit J401 are accessible.
9. Unplug the connector for the fibre optic MOST Bus.
10. Fit protective cap for cable connectorVAS 6223/9(1) onto MOST bus connector (2).
11. Unplug the remaining connectors.
12. Insert two radio release tools T10057 into slots on navigation system with CD drive control unit J401 until they engage. Pointed ends of grips must face outwards.
13. Pull the navigation system with CD drive control unit J401 out of the rack.
14. Press release tabs on navigation system with CD drive control unit J401 and remove radio release tool T10057.
15. Plug in connectors.
16. Insert the navigation system with CD drive control unit J401 into mounting frame until it engages.

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