One problem related to sun roof 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.
While driving the sunroof exploded. There were no cracks of any nature in the sun roof. The explosion left a hole the size of a football.