General notes: Notes

WARNING: This page is about a different car, the 2004 Audi S4, 2004 Audi A4, 2003 Audi A4, and 2002 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

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 Repair Manual and/or Owner's Manual.

NOTE:

Further measures after re-connecting power supply:
See PROCEDURE AFTER INTERRUPTION OF VOLTAGE SUPPLY (1.8L), or PROCEDURE FOLLOWING INTERRUPTION OF VOLTAGE SUPPLY (3.0L).
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.
For additional information
See Operating instructions
When retrofitting, repairing or troubleshooting:
See appropriate System Wiring Diagram .

Radio installation instructions
For detailed instructions (e.g. removing and installing trim panels):
See INTERIOR TRIM - CABRIOLET and INTERIOR EQUIPMENT - CABRIOLET .
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.