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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.
Power steering fluid is easy to check and many people (mechanics included) often forget about - learn how here2004 Audi A6 3.0L V6
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2004 Audi A6 3.0L V6
Animals love the sweet smell of antifreeze, too bad it's toxic! Fix your minor leaks2004 Audi A6 3.0L V6
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it2004 Audi A6 3.0L V6
The burnt out tail light: classic reason for a cop to pull you over - change yours now2004 Audi A6 3.0L V6
Sure you can take it in for a $19 lube, but are you OK with a stripped oil pan and cheap parts in return?2004 Audi A6 3.0L V6