Initial build quality is a different metric than reliability of a series. My German build had 1 malfunction in a tail lite and has been solid since. Mechanically, all engines and many components are made in Germany and shipped to SA for assembly, just like the the X series plant here in the US.
The ibq rating was put out by JD Power a couple years ago and looked at delivery center and dealer repairs prior to sale. Which is tricky because they do not have tell you about them ever as they are still in manufacturer stock. I knew a guy who bought a VW that was a total lemon, he found out that the car was nearly totaled prior to dealership delivery and repaired at the factory.