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What Mileage Does the 2015 Mercedes-Benz C-Class Get After 3,000 Miles?

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CARS.COM —’s 2015 Mercedes-Benz C300 has been in our long-term test fleet for only two months and it’s already accumulated a healthy 3,137 miles. The 2015 C-Class won’s Best of 2015 award for a multitude of reasons, one being its new turbocharged four-cylinder engine.

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In the C300, Mercedes-Benz’s new power plant is more powerful and more efficient than the outgoing C250’s turbo four-cylinder. Fuel-economy ratings of our C300 4Matic all-wheel-drive model with the automatic transmission are 24/31/27 mpg city/highway/combined, up from 22/31/25 mpg for the rear-wheel-drive C250, while the engine’s 241-horsepower four-cylinder is 40 ponies stronger than the outgoing one.

Two road trips under the sedan’s belt so far have proved the Mercedes can hit its 31-mpg highway rating. Combined with the daily commuting, however, overall fuel economy is on the weak side, with our 23.84-mpg average coming up short of the car’s estimated 27-mpg combined rating and the 24-mpg city rating. Testing in the Chicago area brings its fair share of cold weather, and five of the vehicle’s eight premium fuel fill-ups from early January to mid-March measured below 24 mpg. Warmer weather typically brings better fuel economy, so stay tuned for more fuel-economy updates; we’ve only just begun our C-Class testing.

Here’s a quick rundown of the mpg findings for this Mercedes-Benz after 3,000 miles:

1139063428 1427226893339 1 jpg’s Editorial department is your source for automotive news and reviews. In line with’s long-standing ethics policy, editors and reviewers don’t accept gifts or free trips from automakers. The Editorial department is independent of’s advertising, sales and sponsored content departments.

Photo of Joe Bruzek
Managing Editor Joe Bruzek’s 22 years of automotive experience doesn’t count the lifelong obsession that started as a kid admiring his dad’s 1964 Chevrolet Corvette — and continues to this day. Joe’s been an automotive journalist with for 16 years, writing shopper-focused car reviews, news and research content. As Managing Editor, one of his favorite areas of focus is helping shoppers understand electric cars and how to determine whether going electric is right for them. In his free time, Joe maintains a love-hate relationship with his 1998 Pontiac Firebird Trans Am that he wishes would fix itself. LinkedIn: Email Joe Bruzek

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