A/C dead, where's the A/C compressor located?

Hello, my wife's 2007 Q7 A/C died yesterday in 85 degree weather. My first thought was to add refrigerant, I read the pressure, it read fine, but I still added the refrigerant just in case...pressure didn't change at all. My next thought is it's the A/C compressor. I know what it looks like, but I can't seem to find it under the hood. I see the engine and all of the spinning components through which the timing belt is threaded, but what do I have to remove to get to the compressor to check if its spinning? I'm guessing it's going to be somewhere near the refrigerant intake, so maybe under the brake fluid under the right far corner, or maybe down below the right (driver's side) headlight.





Thanks.