Hi,
the video gives you a step by step tutorial how to replace the radiator of your Audi C4 with V6 engine.
http://www.youtube.com/watch?v=g0S0SIAVQxM
The video has a German soundtrack, but English subtitles are added to YouTube. If you don't see them by default, watch the video directly at YouTube and press the subtitle button below the video.
Enjoy it.
Jürgen