The battle between Audi, BMW and Mercedes-Benz

Despite a lagging global economy these days, luxury car sales have been holding steady, especially in the US. The battle between Audi, BMW and Mercedes-Benz remains fierce on all levels, including high-performance models. According to a new report from BimmerBoost and Automobile, BMW is apparently looking at going above and beyond its M performance division to compete directly with Mercedes' AMG Black Series.