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|2009||2009 4dr Sedan 382-hp 5.5L V8 7-sp shiftable automatic RWD||25.5||
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|With the turbocharged 402hp 4.7L V8 engine, 9-speed shiftable automatic transmission, and rear-wheel drive, the 2009 Mercedes-Benz CLS has been averaging 25.5 MPG (miles per gallon).
The 2009 Mercedes-Benz CLSs in this analysis were driven mostly on the highway at an average speed of 75 miles per hour (about 82.5 percent of the miles driven). The rest of the miles were in the city (2.5 percent), in the suburbs (0 percent), and in heavy traffic (0 percent).
In addition, the average 2009 Mercedes-Benz CLS in this analysis was driven on flat terrain with a medium foot and the AC on most or all of the time.