As others have mentioned, I'm sure the mileage would be reduced in order to meet U.S. standards. Even then, it'd be outstanding mileage. Which wouldn't sell, because it doesn't have the right image. It isn't fast enough to sell to most of our masses (you need at least 300 hp to take your kids to soccer practice; 350 if you're really important), and it doesn't have the pat-yourself-on-the-back buzz that a hybrid does. All it is is a simple diesel engine in a small, no-frills car with enough power to get you there and enough room for you and a few belongings. There aren't very many people in this country who appreciate that.

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1987 300D, arctic white/palomino--314,000 miles
1978 240D 4-speed, Euro Delivery, light ivory/bamboo--370,000 miles
2005 Jeep Liberty CRD Limited, light khaki/slate--140,000 miles
2018 Chevy Cruze diesel, 6-speed manual, satin steel metallic/kalahari--19,000 miles
1982 Peugeot 505 diesel, 4-speed manual, blue/blue, 130,000 miles
1995 S320, black/parchment--34,000 miles (Dad's car)