DOT 5 is a silicone based brake fluid. It is not compatible with any polyethylene glycol based fluids (aka won't work with DOT 4).
Just make sure if you upgrade to a DOT 5 you get all of the DOT 4 out of your system.

 

Hell i cant find some DOT4 around my area let along DOT5. I mean i can always go online, but sometimes those things just pop up and i would need to go local.

 

I'm sure you could buy it from a local Audi/VW stealership.

 

I found the ATE Blue at a local parts store.. you need to go to one that serves your local repair shops, not the retail places like Kragen or AutoZone that specialize in the backyard mechanic and ricers. I'm not sure if NAPA stores carry it, but I would not be surprised if they do have it on hand.

 

I hate those damne Stealerships! Guess I have to go to them every now and then.

 

Ok here's my shopping list from ecstuning.com
Let me know if this looks like a good set-up for front brakes:

ECS Slotted/Cross-Drilled Rotor - 12.3 (312x25) - Pair, Zinc Or Cadmium Plated
Hawk Performance Brake Pads - HPS Compound (set Of 4 Pads)
Pentosin Super DOT4 Brake Fluid

with tax and shipping it comes to aroundto $300.00