By traditional size and body-style classification, the BMW 6-series is now an outlier—it’s bigger than all the two-door luxury coupes, save the even larger, more expensive S-class coupe from Mercedes-Benz. In the mid-size luxury segment, sales instead tilt toward fast-roofed four-doors exemplified by the Mercedes-Benz CLS and the Audi A7—even within the 6-series range, the […]
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