Radio Interference

[A4Pete]

My radio operates fine until I switch on the heated rear window. It then sounds like it is all out of tuning. with lots of interference. Any ideas?

[hagis]

Hi Pete,

This may be of use:

http://www.vwaudiforum.co.uk/forum/showthread.php?t=17268&highlight=a4+stereo+interference

[Froggy]

There are some shunts used in-line with the 12v Feed to the heated window elements. These can fail giving you the symptoms you describe.

I'm not sure of their exact location unfortunately, but I'm sure someone here can help.