This Audi A4 TDI S line from 2007 offers a superb blend of performance and efficiency, boasting an impressive fuel economy of 49 miles per gallon. As a 2.0 litre diesel, this S line variant presents a compelling choice for those seeking a well equipped and economical vehicle. The low CO2 emissions further enhance its appeal, indicating a more environmentally conscious driving experience. This combination of a strong fuel economy figure and reduced emissions makes this Audi A4 a stand out option within its class.