The BMW 6 Series Gran Coupe is a four-door luxury coupé: a sleek, large executive car rather than a conventional family saloon or SUV. The BMW 6 SERIES GRAN COUPE (2011-15) 640I 4DR GRAN COUPE 3.0 SS 320 EU6 SE AUTO8 pairs stylish, low-slung looks with a practical rear seat and boot. In the UK used market, it sits above mainstream saloons, appealing to buyers wanting premium style with presence. mycarcheck.com records show eight checks covering three distinct VINs, so these figures offer a small snapshot rather than a broad reliability verdict. Across those records, the average private-sale valuation was £16,500, recorded mileage averaged 55,000 miles, and annual mileage 13,000. Cars had an average of 1.875 previous keepers, suggesting varied ownership histories. With smooth petrol performance, an automatic gearbox and comfortable cabin, the 640i suits commuting, business travel and small families prioritising comfort. Its elegant design and lively drive rival the Mercedes-Benz CLS while offering useful everyday practicality; expect higher running costs than a mainstream saloon.