I have a '00 A4 without Bose
I bought new speakers for the front, new amp and new subs. I'm hooking up the rear speakers to the amp for audio, using rca's. I heard that on the left rear speaker there's a white wire you can hook up to an amp so when you shutoff the car or the radio the amp will shut. But this was on a '97. SO I went and looked and I see the white wire. Does this work on '00 or later?
I'd appreciate the help!

just tie in the remote wire into soemthing that only comes on after you started the car... i.e. radio

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2000 A6 2.7T Q
BONE STOCK!

Actually for people doing a search. On the back left speaker you'll see a clip with tons of wires. That's the amplifier that supplies power to the back speakers. The white wire is a remote wire that can be used to turn on and off an amp. It will turn on and off when you shut off your radio.
I bought a Clarion ProAudio deck and had my friend cut some ABS plastic to make me a dash kit. I did not use the HU amp. I ran preamp to my one amp that runs my front speakers and then preamps for my subs. So I didn't hook up my radios speakers just for the remote and power. Man, it's unbelievable! I have 600 watts RMS to my 2x10" AudioBahns, then 85watts rmsx2 to my Audiobahn 5 1/4 component speakers. Man the highs are bad. I'm going to hook up components to the back.