General Notes

General Notes

CAUTION:
Before beginning repairs on the electrical system:
- Obtain the anti-theft radio security code.
- Switch the ignition off.
- Disconnect the battery Ground (GND) strap.
- After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Owner's Manual.

NOTE:
- Further measures after re-connecting power supply:
- Before troubleshooting or servicing, technicians must be familiar with the functions and operation specifics of the applicable standard or optional radio system. Always read the radio owner's manual and review all radio, tape player and CD player/changer functions.
- Wherever possible, only genuine Audi parts should be used. Only then can trouble-free installation and optimal reception be guaranteed.
- All Audi radio systems are encoded for the instrument cluster in the convenience coding. It is not necessary to enter the code when disconnecting and reconnecting the power supply, removing and installing the same radio or removing and installing the same instrument cluster.
- If the "Transport" message appears on display after switching on the radio, transport mode must be deactivated.

Do this using vehicle diagnostic, testing and information system VAS 5051.

Notes for retrofitting radio:
- The connectors on the factory installed radio wiring harness are designed for genuine Audi radios.
- Radios with different types of connectors must be installed using adapter wires.
- When other radio units are installed it can have an effect on the antenna amplifier, since the original Audi radio units have a remotely driven antenna (the voltage supply of the antenna amplifier is driven via a center wire of the high frequency cable). Use a remotely driven adaptor.

Note for retrofitting CD:
For CD preparation, the wiring harness for the CD changer is already installed in vehicle. The connecting wire can only be used with genuine Audi CD changers.