2012 Mercedes-Benz SLS AMG Roadster Long-Term Road Test


2012 Mercedes-Benz SLS AMG Roadster: Fuel Economy Update for February

March 4, 2013

2012 Mercedes-Benz SLS AMG

During February, we finally put some real road under the Mercedes-Benz SLS AMG Roadster's tires, 3,760 miles worth. Most of that came from EIC Oldham's snowy rip to South Dakota (roughly 3,200 miles), and in the past four weeks, the big Benz averaged 16.2 mpg, up almost 3 mpg from its January average. No doubt, a steady diet of Great Plains highways helped nudge that number upwards.

With its mix of road trip and local domestic duties, the SLS returned both its best and worst fills this month, as well as its best range. The roadster's on-board fuel economy meter also proved remarkably accurate. Four times, it was either dead-on or within a few tenths of our calculations.

Worst Fill MPG: 7.7
Best Fill MPG: 20.3
Average Lifetime MPG: 15.2
EPA MPG Rating (City/Highway Combined): 14/20/16
Best Range: 378.6 miles
Current Odometer: 19,800

Dan Frio, Automotive Editor @ 19,800 miles

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