Downsizing strikes again! Mercedes-AMG has unveiled the new GLC 43 and GLC 63 S E Performance, both of which rely on a small 2.0-liter, four-cylinder engine. It's the same longitudinally mounted M139l installed in the latest C63 sedan and wagon, as well as in the SL 43 roadster. In its transverse configuration (M139), it powers AMG's spicy "45" compact cars as well as the recently launched base version of the Lotus Emira.
