- Newest year: 2014
- Gas
- Small cars
2012-2014 Mercedes-Benz CLS-Class MPG & Fuel Cost
3 model years · 18–20 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 2 of 10 small car configurations, MY2014. Ranked against all rated configurations, not sales-weighted.
2012-2014 Mercedes-Benz CLS-Class at a glance
The 2012-2014 Mercedes-Benz CLS-Class covers 3 model years in the EPA database (12 configurations in all), rated 18–20 MPG combined. The newest model year, 2014, costs about $3,990 a year to fuel for its most efficient version, the CLS550 4.7L 8-cyl turbo RWD (20 MPG), at premium gasoline $5.36/gal (U.S. average, Sep 2026). EPA changed the ratings in 2013 and 2014.
2012-2014 Mercedes-Benz CLS-Class by model year
What the 2014 CLS550 4.7L 8-cyl turbo RWD costs to drive
Per month
$333
$3,990 a year ÷ 12
Per 25 miles
$6.65
Per 100 miles
$26.60
Five years
$19,950
5 × the yearly cost, prices held at today's level
vs the small car median
$930more a year
Class median $3,060 a year, MY2014
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2014 Mercedes-Benz CLS-Class MPG
Versus 2013: The most efficient configuration stays at 20 MPG. Its annual cost goes from $4,110 to $3,990, $120 less.
Gas configurations (6)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CLS550 (Most efficient) | 4.7L 8-cyl turbo | RWD | 17 | 25 | 20 | $3,990 |
| CLS550 4matic | 4.7L 8-cyl turbo | 4WD | 17 | 24 | 19 | $4,160 |
| CLS63 AMG | 5.5L 8-cyl turbo | RWD | 16 | 25 | 19 | $4,240 |
| CLS63 AMG S | 5.5L 8-cyl turbo | RWD | 16 | 25 | 19 | $4,240 |
| CLS63 AMG 4matic | 5.5L 8-cyl turbo | 4WD | 16 | 22 | 18 | $4,480 |
| CLS63 AMG S 4matic | 5.5L 8-cyl turbo | 4WD | 16 | 22 | 18 | $4,480 |
6 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2013 Mercedes-Benz CLS-Class MPG
19–20 MPG · $4,110–$4,240/yr
Versus 2012: The most efficient configuration stays at 20 MPG. Its annual cost stays at $4,110.
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CLS550 (Most efficient) | 4.7L 8-cyl turbo | RWD | 17 | 25 | 20 | $4,110 |
| CLS550 4matic | 4.7L 8-cyl turbo | 4WD | 16 | 25 | 19 | $4,150 |
| CLS63 AMG | 5.5L 8-cyl turbo | RWD | 16 | 25 | 19 | $4,240 |
3 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2012 Mercedes-Benz CLS-Class MPG
19–20 MPG · $4,110–$4,230/yr
Gas configurations (3)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| CLS550 (Most efficient) | 4.7L 8-cyl turbo | RWD | 17 | 25 | 20 | $4,110 |
| CLS550 4matic | 4.7L 8-cyl turbo | 4WD | 16 | 25 | 19 | $4,150 |
| CLS63 AMG | 5.5L 8-cyl turbo | RWD | 16 | 25 | 19 | $4,230 |
3 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Fuel cost by state
Yearly cost of the CLS550 4.7L 8-cyl turbo RWD: $4,750 in California and $3,460 in Texas, a $1,290 difference.
- California $4,750
- Washington $4,470
- New York $3,940
- Florida $3,640
- Texas $3,460
Similar cars
Closest combined MPG among MY2014 small car models.
Generations
Frequently asked questions
What gas mileage does the 2012-2014 Mercedes-Benz CLS-Class get?
EPA rates the 2012-2014 Mercedes-Benz CLS-Class at 18–20 MPG combined across 12 configurations and 3 model years. The most efficient version, the 2014 CLS550 4.7L 8-cyl turbo RWD, is rated 20 MPG (17 city, 25 highway).
Which years had the best MPG in the 2012-2014 Mercedes-Benz CLS-Class?
Every model year of the 2012-2014 Mercedes-Benz CLS-Class tops out at 20 MPG combined, so no year is better than another.
Did EPA ratings change during the 2012-2014 Mercedes-Benz CLS-Class?
Yes. Ratings changed in 2013 and 2014.
How does the 2012-2014 Mercedes-Benz CLS-Class compare with the previous generation?
The previous generation (2010-2011 Mercedes-Benz CLS-Class) is rated 14–16 MPG combined and costs $4,870–$5,740 a year to fuel; the 2012-2014 model is rated 18–20 MPG and costs $3,990–$4,480 a year.
How much does it cost to fuel a 2014 Mercedes-Benz CLS-Class per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the CLS550 4.7L 8-cyl turbo RWD costs about $3,990 a year. Across all 6 configurations the cost runs $3,990–$4,480 a year. That is a $490 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2014 Mercedes-Benz CLS-Class 100 miles?
About $26.60 per 100 miles for the CLS550 4.7L 8-cyl turbo RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $26.60 and $29.87 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2014 Mercedes-Benz CLS-Class more efficient in the city or on the highway?
The CLS550 4.7L 8-cyl turbo RWD is rated 17 city and 25 highway MPG, so it is more efficient on the highway, by 8 MPG.
How does the 2014 Mercedes-Benz CLS-Class compare with other small car configurations?
The CLS550 4.7L 8-cyl turbo RWD costs about $3,990 a year to fuel, $930 more than the class median of $3,060, and less than 2 of 10 small car configurations. The comparison covers all 360 rated small car configurations for MY2014, not weighted by sales.
Is the 2014 Mercedes-Benz CLS-Class different from the 2013 model?
The most efficient configuration stays at 20 MPG. Its annual cost goes from $4,110 to $3,990, $120 less. EPA lists 6 configurations for 2014 against 3 configurations for 2013. See the 2013 Mercedes-Benz CLS-Class for that year.