KBB.com Reviews the 2018 BMW 6 Series
Luxury car buyers can now choose from the performance-oriented 2018 BMW 6 Series convertible and Gran Coupe sedan models that will be available at dealerships around the country. You can trust that whichever style best suits your needs, you'll enjoy the legendary 6 Series performance. BMW has equipped the 640i model with a 3.0-liter turbocharged…