M Marks the Spot: 2018 BMW M550i xDrive Review
As luxury automakers start to downsize their engine capacities to more innovative and surprisingly quick four-cylinder powertrains, the larger engine offerings are falling into a specialty category. Mercedes-Benz has spun off its elite high-performance AMG brand into what is now known as Mercedes-AMG. While AMG was once known to exclusively offer some of the most outstanding performance variants of everyday Mercedes-Benz vehicles, the AMG badge is now displayed on anything Mercedes-Benz deems sporty. The same can be said for BMW’s M brand. Back in the day, seeing an M badge…
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