Great video and thanx for taking the time. I actually purchased an 06 A8L Sport and the only issue with exterior was same as your issue. Think it was sold because of the one flaw but, now im fixing. Awesome !!!!
I would bet it is the oil filter housing. There is a figure-8 rubber gasket that leaks. It is under the intake manifold. Is it leaking really bad? I would try putting 2 bottles of “liqui-moly oil saver” in the engine oil and run it for a few hundred miles.
