How do I troubleshoot my rear window defroster? on 2007 Audi A8 Quattro

When I press the dashboard button for the rear defroster, the light comes on and, the outside mirror defrosters, which are also controlled by the same switch, begin to defrost. I have no indication the rear window defroster is working no matter how long I wait. I don't see a fuse specified in the owners manual. Can anyone help me with this? The window grid appears to be intact.

by in Potwin, KS on December 21, 2012
1 answer 1 comment
ANSWER by on December 22, 2012
maybe there is no power to your defroster
COMMENT by on January 27, 2013
this reply states the obvious. the question is how do i troubleshoot it?

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