Audi A4 battery replacement

Tools:

• A set of keys
• socket set for socket wrench

Notes: 

Non-AUDI radio equipment requires a code to be entered when the battery is disconnected  . Therefore, it is necessary to find out the code and write it down. Otherwise, the radio receiver can only be switched on by its manufacturer.

In order not to lose the data recorded on electronic media, you can use a temporary battery of small capacity. It is connected to the cigarette lighter before disconnecting the battery according to the manufacturer's instructions. 

If the battery is only disconnected and not removed, it is necessary to move the cover over the battery to the right and remove it. Serious damage to the alternator and electrical appliances can occur due to incorrect battery connection.
Do not grease battery terminals.

1.  Switch off electrical consumers. Switch off the ignition. In this way, electronic devices will be protected from possible damage.

2.  Models with Telematics: Activate the service mode of the Telematics control unit, as otherwise, when the battery is disconnected, the Telematik emergency battery is discharged. To do this, enter the key sequence #4610# on the control handset and confirm it by pressing the Navi key .

3 . Remove the cover over the water collection area.

4.  Disconnect the cables from the battery, first the ground cable, then the positive cable.

5.  Loosen the screw on the mounting plate at the base of the battery.

6.  If necessary, disconnect the central gas outlet hose from the battery.

7.  Pull out the battery under the mounting plate and remove it from the engine compartment.

8.  Before installing the battery, clean the poles to a shine. A brass wire brush is suitable for this purpose.

9.  Install the battery in place, slide the battery base under the mounting plate and secure with a torque of 12 Nm.

10.  Before connecting the battery, check that the ignition and all electrical consumers are turned off.

11.  Connect the positive cable to the positive pole (+) first, then the negative cable to the negative pole (-). Tighten the fastening nuts to a torque of 6Nm.

12.  Install the cover over the water collection area.

13.  If necessary, enter the radio code.

14.  If necessary, re-enter the radio programs.

15.  Set the clock.

16.  Models with Telematic system: Deactivate the service mode of the Telematic control unit. To do this, press the Navi key on the control handset.

The article is missing:

• Photo of tools
• High-quality repair photos

Source:  http://carmanz.com/audi/a4-b6-2000-2004/6563-a420005-4-4.html