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GREEN | 6 out of 10
2015 Mercedes-Benz C300 4Matic: 24 mpg city, 31 mpg highway, 27 mpg combined
2015 Mercedes-Benz C300 (rear drive): C300: 25 mpg city, 34 mpg highway, 28 mpg combined
2015 Mercedes-Benz C400: 21 mpg city, 29 mpg highway, 24 mpg combined
The official gas mileage figures for the 2015 Mercedes-Benz C-Class reveal it to be a remarkably efficient vehicle in light of its size, luxury, and performance. On the other hand, it's no diesel or hybrid in terms of greenness.
The C300 4Matic uses a new 2.0-liter turbocharged four-cylinder engine to score 24 mpg city, 31 mpg highway, and 27 mpg combined—a gain of two mpg over the previous 1.8-liter turbocharged engine in last year’s C250, despite increased performance and the addition of standard 4Matic all-wheel drive as well.
The newly-arrived C300 in rear-drive form improves the 4Matic all-wheel-drive version's gas mileage figures slightly, at 25 mpg city, 34 mpg highway, and 28 mpg combined.
The 2015 C400 4Matic rates only marginally poorer at the pump, despite its turbocharged 3.0-liter V-6 engine: 21 mpg city, 29 mpg highway, and 24 mpg combined.
In an early drive with the four-cylinder C300 4Matic, we saw more than 30 mpg in a 90-mile mix of freeways, suburban traffic-light conditions, and tight two-lane country roads. Then over a much longer trip of more than 200 miles in the V-6 C400 4Matic we averaged around 21 mpg on a mix of two-lane rural roads and freeways.
Neither the 2015 Mercedes-AMG C63 nor the C63 S have been rated by the EPA as yet.
The 2015 Mercedes-Benz C-Class is no hybrid, but for its class, it scores decent gas mileage.