I know some of my questions are going to most likley be redundant, but I have searched here for a while before posting. I am familiar with working on Chevy's, and to a degree my Audi, also posting in other forum's, etc. Here's the deal:

- Bought the car new in 2000. Used full synth, and only 91 octane in it. Put a K&N air filter + aftermarket bypass valve about 5 years ago. Belt replaced at 100,000k

since then:

- I ran the car smack into a friend about 8 months ago. The car is still runninggreat believe it or not. I rear ended her. I bent the rad slightly, and the rad support cracked. Other than that, the bumper, and everything else is in good shape. She was in an SUV, so it hit square in the middle of the rad, about 10 MPH. It broke the tabs off the lights, which I replaced (the lights). It bent the hood up (replaced). and it broke my RS4 grille (replaced with OEM). So essentially, I haven't replaced the rad, and rad support.

- the heat makes a noise like bearings are shot. The heat only comes out when the car is moving. When I turn the heat on, I feel like the car doesn't perform as well. This problem was happening before I ran into my friend like an idiot.

- Passanger side heated seat doesn't work

- Some fun facts: Car has 150,000 miles. 1.8tqm. The car is a billy goat. I can't beleive its still running. I beat the crap out of it.

Questions:

- Where can I buy the anti freeze for this thing? What is it called specifically? I will need to flush it what I replace the radiator.

- Why doesn't the heated seat work. My wife is driving me nuts.

- Why, why, why is my heater making this noise and only working while in motion? I think its the AC compressor making the noise.