One problem related to wiper has been reported for the 2004 Audi A8. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Audi A8 based on all problems reported for the 2004 A8.
The windshield wipers will stop intermittently. They have stopped during heavy rain on an expressway several times resulting in a loss of vision. The dealers could not get the problem to repeat so they said that they couldn't do anything. I called the Audi advocate phone line and was told that Audi would not address the issue. Then I wrote Audi and ask for a refund and the Audi advocate returned the call and maintained the same response.