One problem related to wiper has been reported for the 2014 Audi S8. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Audi S8 based on all problems reported for the 2014 S8.
During our recent rains I discovered water dripping on me from the center overhead console at the top of the windshield. This totally distracted me while driving as I was shocked by it's sudden occurrence. The next day, I suspected sunroof drains and proceeded to chase a flexible line thru them in the front drains and tested with water, it drained fine and no evidence of dripping inside. Went out driving in the rain and discovered the leaking occurring again along the top of headliner/windshield junction at the passenger pillar and again in the center overhead console. Once again distracted to catch the leaks. A safety concern! I heard wind-noise which changed in tone as I pressed against the windshield. I'm assessing the windshield has lost its bond to the weatherstrip components. I'm shocked to find this in a $127k luxury car and it's hard to not be distracted during inclement weather.