+1 on the diy. I'm on there all the time just looking at the different things you can do.

First thing i did when i got my a4 was the oil and then changed the brake pads.. which obv led me to replacing the brake fluid.
I'm going to be changing the differential fluid as soon as i can get around to it.

 

props to that site too... i learned many things on that site..when i baught my a4 the first thin i replaced is the tires, coz they are pretty worn out, the next is change oil/filter. then air filter and cabin filter, and tom the coolant sensor..