I am going to replace the rotors and pads on all four corners this weekend is there any special tools needed and anything i need to watch out for that is special on an audi?

 

You'll need a disc brake caliper tool in order to rotate the rear pistons into the caliper. You can borrow a set from Autozone for free. Otherwise, everything else is pretty straightforward.

 

Ok and another question, my abs light is on and my front brakes make a loud squealing noise when i brake does this have anything to do with the abs because they seem to not be bad.

 

I don't think the sqealing has anything to do with your ABS. What kind of pads are on the car? If you bought it used, they are likely of an inferior quality and/or they were installed without shims or an adequate amount of brake quiet. Or, they could just be really worn..

 

In addition to the caliper screw tool you'll need a 7mm Allen but for your ratchet to take the slider bolts out so you can change the pads, and a 17mm wrench or socket for the carriers so the rotors can come off. While you're at it, you can paint the calipers for a little detail touch using duplicolor 500 degree paint. I spray it into the cap for the spray can and apply it with a 1" foam brush from Lowes.

If you have a few bucks you can spend and can wait a couple days, I highly advise buying the A8 front brake upgrade from ECS Tuning or PureMS. Awesome upgrade and cheap enough for the gain in braking power ($265ish for blank rotors with carriers or about $350 for slotted or drilled/slotted). Very much worth the money. You can see them in my sig pic inside my 18" wheels. They're an inch larger in diameter and make a big difference. You have to have at least 16" wheels for them to fit.

 

Would that be a piece of for the set?

 

That's for the set of two rotors and two carriers. You'll use your existing calipers and just need to get pads. I got Hawk ceramics but you will still have a good performance gain just using organic pads. The increased torque arm effect of moving the caliper outward is what makes most of the difference.