MB AND BMW's OWN history "GAVE" the Germans there "precision" image but I was referring to that there is some sort of a LUXURY car = German carDisagree.
Being German is certainly an advantage for MB/BMW/Audi, mainly due to the German heritage/image for building premium cars. Not to mention the image of superior engineering and bespoke technology.
On the flip side the Germans rarely offer better product than the competition. Maybe better reviewed in the first year after launch, but overtime it becomes clear that the cars are not "better than the competition". This applies to Mercedes more than anyone, since almost every MB vehicle launched before 2012 is absolutely an inferior product compared to its competition. This includes the W204 C-class, the W212 E-class, the W221 S-class, the GLK class, and the W164 and earlier M-class. None of these are outstanding cars by any stretch of the definition. Overrated yes. But that harks back to the image, brand, and indeed the perception of German cars.
Cadillac is in the opposite boat. Granted before the ATS, I don't believe any Cadillac has been worthy of a premium badge, but even if Cadillac were to build world beating luxury cars, counteracting the negative image associated with American cars (poorly built, poorly engineered, cheap) would be a constant battle. As mgescuro says, there is no clear definition of what a premium American car is - a definition that people outside of America (and those who aspire to be like them) would find appealing as well.
The Japanese had no history of luxury cars but they still had an image for building well engineered and precisely made cars. This alone is enough to help springboard a luxury brand, but lacking the heritage image leaves them chasing the Germans.
I agree GM cr*ped the bead when it comes to quality and durability of AMERICAN premium cars
and I agree on that MB LOST there way and I am NOT convinced that have it back and BMW NEVER was reliable at a Japanese car level
if Opel moved Luxury I do NOT think they would fair ANY BETTER then CADDY as BOTH built a reputation of NON "precision" engineered Luxury cars