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HOMESERVICE MANUALSAUDI2004A6 QUATTRO, 2.7 D, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTSTEERING COLUMN SWITCHESRADIO, TELEPHONE, NAVIGATION, TRIP COMPUTERTELEMATICSGENERAL INFORMATIONNOTES
2004 Audi A6 Quattro, 2.7 D, Standard

General information: Notes

2004 Audi A6 Quattro, 2.7 D, StandardSECTION Notes
CAUTION: Before beginning repairs on the electrical system:
  • Obtain the anti-theft radio security code.
  • Switch off all electrical consumers.
  • Switch ignition off and remove ignition key.
  • Disconnect negative (-) battery terminal.
  • On vehicles equipped with Audi Telematics by OnStar®, switch-off the emergency (back-up) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery. See EMERGENCY (BACK-UP) BATTERY, SWITCH ON/OFF, RESET TIME REGISTER .
  • After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Manual and/or Owner's Manual.
  • After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar®, switch-on the emergency (back-up) battery for the Telematic/Telephone Control Module. See EMERGENCY (BACK-UP) BATTERY, SWITCH ON/OFF, RESET TIME REGISTER .

Before troubleshooting or servicing, technicians must be familiar with all telematics functions, operating specifics and the particular service plan which the customer subscribes to. Refer to "Audi Telematics by OnStar®" Self Study Program (SSP) and "Audi Telematics by OnStar® Owner's Manual and/or OnStar®" Quick Reference Guide" to become familiar with applicable features and functions.

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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.