2009 Mercedes-Benz S320 CDi BluEFFICIENCY: Most Frugal S-Class Ever

Who needs a complicated and apparently expensive, hybrid drivetrain when you can achieve an average fuel consumption of 7.6 lt/100 km (31 mpg US) in a fully equipped large saloon like the S-Class simply by using a diesel engine and a few supplementary measures? Even Merc’s own S400 Hybrid isn’t that good sipping an average of 7.9 liters of petrol for every 100 km (29.8 mpg US). -Continued

And even if the S320 CDi is a tad slower than the S400 Hybrid completing the 0 to 100 km/h (62mph) sprint in 7.8 sec instead of 7.2 sec (top speed for both models is 250 km/h), the difference is insignificant for your typical S-Class owner that that will most likely use the vehicle as a highway cruiser and not a highway racer

The latest variant of Merc’s luxury saloon, which is due to take over from the S 320 CDI from the end of this year, is equipped with the same V6 turbo diesel powerplant as before delivering an output of 235 HP and 540 Nm. But thanks to the BluEFFICIENCY package that includes on-demand power steering, a 7G-TRONIC seven-speed automatic transmission with standstill decoupling, as well as 17-inch light-alloy wheels shod with reduced rolling resistance tires, the German automaker has managed to reduce the standard S320 CDI's average consumption by 0.2 lt /100 km.

Adding to its allure, pricing for the BlueEFFICIENCY S-Class model in Germany remains the same as the S320 CDI at €70,864.50 (incl. VAT) and at €78,718.50 for the long-wheelbase version.