BMW Shows Off Concept 4 Series Coupe By: CNBC.com News January 14, 2013 at 07:13 AM EST BMW showed its new Concept 4 Series Coupe to CNBC on Monday at the Detroit Auto Show, saying it has "so much more substance" than its popular 3 Series predecessor. Read More >> Related Stocks: Ford Motor General Motors Honda Motor Company ADR Nissan Motors ADR Toyota Motor Corp Ltd Ord ADR