Question: what is the best fuel economy luxury car?
Answer: Mercedes-Benz E-Class E220d. ... , Volkswagen Passat 2.0 TDI 150. ... , Alfa Romeo Giulia 2.2D 180. ... , BMW 3 Series 320d. ... , Mazda 6 2.2 Skyactiv-D. ... , Skoda Superb 1.6 TDI 120. ... , Audi A4 2.0 TDI 190. ... , Vauxhall Insignia Grand Sport 1.6 CDTi 110.