I wanted to upgrade the aging factory stereo on my 2004 Audi, and get all the goodies that come with a 2010 car: built-in GPS navigation, Sirius Satellite, Bluetooth, MP3 playback, and multi-media capabilities. But buying a new car seemed a heavy price to pay for what amounts to a few creature comforts.
Basically I'm still quite happy with the car. I just wished there was a simple way to upgrade the electronics while still keeping the Audi factory look. Turns out there is. I upgraded my car, and you can too. And it's not as difficult as you might think.
You can have the Audi dealer do it all for around $3.500. Or you can do it yourself for around $1,400.