Months ago I posted here about an issue with the HVAC system in my A8L. The system is completely erractic and overrides any fan settings you set and operates the air at full maximum or no air flow at all. After replacing several computers, the head unit, fan blower motor and personla visit by an Audi engineer and the regional DSM Audi's official diagnosis is "your car is possessed." Without asking they offered to replace it the day the DSM was in and I accepted and await its identical replacement next week. They want to study the vehicle further once they own it to determine the actual cause for future reference. I had two lemon Porsche Cayennes prior to this vehicle so I hope my lemon streak is over!!