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The video above shows you how to replace the battery in your 2004 Audi A6. We recommend changing the battery in Audis every 4 years. Although some batteries last much longer, most batteries begin breaking down chemically after four years, so you could experience dimmer headlights and other negative effects before you have a dead battery in your A6 that you need to replace.
Replacing the battery in your A6 involves removing the terminals. When you reconnect the terminals, your radio presets are likely to be cleared out. In some A6s, you may need to re-enter a security code to get your radio to work again. Check for this code in your owners manual - it will usually be either a sticker or small card in the booklet. If you can't find it, call Audi and they will give you the code for free. In many Audis, the transmission "learns" how you drive over time and makes adjustments, so you may experience altered driving dynamics as your car re-learns your driving style after changing the battery.
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2004 Audi A6 3.0L V6
Learning how to jump your car before you need to is an excellent idea2004 Audi A6 3.0L V6
Don't send mixed signals - if your turn signal doesn't blink, or blinks rapidly, you likely have a burnt out bulb2004 Audi A6 3.0L V6
Small bulbs that burn out regularly - did you know you can replace these with LED lights?2004 Audi A6 3.0L V6
Help keep your car as responsive as you are by maintaining proper power steering fluid levels2004 Audi A6 3.0L V6
Don't be caught in the fog with burnt out fog light bulbs2004 Audi A6 3.0L V6