I dont think you can judge the way the car market is going by the quality and reliability of american cars vs. other cars. Honda and toyota have suffereed big losses recently, does that mean they make bad cars? its just the level of pricing thats effecting the car business. American companies sell cheaper cars, people buy more cheaper cars than the more expensive cars. People buying AMGs and M cars, arent really hurting that bad obviously. you can get american made cars for reasonable affordable prices that appeal to more of the people that are struggling than the Ms and AMGs, its common economics..
All this shows is that the rich are getting richer.