i made the oil change 3 days ago but the Service Oil Light still On, what shold i do? please help me!!
its my 1st audi I HAVE A 99A4 QUATTRO

From Bentley manual:
* Switch off ignition.
* Push and hold the right button (on instrument panel) while simultaneously switching ON the ignition; display will show the word "SERVICE" or "SERVICE OIL".
* Depending on the version, either push in or pull out the left button and hold until display clears (it'll show "---"). The next service interval or word "SERVICE ---" should be displayed.
* Push the right button again and repeat procedure for the next maintenance interval.

dudu i have this same problem and posted a while ago and they just told me to ignore it. thanks andreigbs now i know what to do when i change my oil this week. haha

It doesn't come on just because you change your oil; it's an interval light, it comes on at the factory recommended intervals based on your mileage.

Yeah my "service" light is on..I was dreading the countdown. My car started at 400Mi till service. Still don't have it done..Ill just flush all the fluids myself.

thank you "andreigbs" i'll tray that today...

No prob, it should work for you. BTW, you can reset the mileage/time intervals for the service indicator with VAG-com. I've done it already on mine to remind me at 5k for oil and 10k for inspection (those are the only two options). Mine came with 8k miles OIL indicator and 15K inspection reminder, but I'm not one to procrastinate on car maintenance (everything else though....)