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.
The new 4 Series will be BMW's improvement to the two-door 3 Series Coupe and other variants in the line, much the same way as the 6 Series relates to the 5 Series.
BMW took the luxury sales crown in the U.S. for the second year in a row in 2012, edging out its German rival Mercedes-Benz.
Ludwig Willisch, president and CEO of BMW North America, said he expects the U.S. luxury market to grow in 2013 in its historical 11 percent to 12 percent range.
"[We're] pretty sure the total market for luxury cars will raise again," Willisch said on Squawk Box " in a First on CNBC interview.
—By CNBC's Phil LeBeau; Follow him on Twitter @LeBeauCarNews
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