After a long time of searching finally yesterday I upgraded from a D3 (2004) to a 2012 A8L, which is Audi CPO with Audi care till 45K miles. I'm sill studying the car. There are a few thing I have noticed so far like the smaller Trunk size on the new one, the whole car also seems to be much lighter?! It is CPO Audi vehicle, so I hope that all possible glitches will be covered. One thing I also noticed is that the Ambient interior light does not turn ruby red, so I have to go back to the dealer and ask to check it.
Based on your experience so far, how reliable this car has been for yo guys? I spent about 60K for this car, so I hope it is worth it!!

Thank you for your input.
A.