BMW will ensure it still delivers a quality product, as someone noted, it is a mindset. Look at Spartanburg....any big quality complaints about the X5 / Z4??
Also, if you are hell bent on a Hecho in Deutchland, try an Euro-delivery in Germany, whatever algorithm they will use to determine where your order is produced will sure output a German production facility (as long as German plants actually produce the model you ordered).
"Aerodynamics are for people who cannot build engines"......Enzo Ferrari