- Newest year: 2015
- Gas
- Diesel
- Small SUVs
2010-2015 Mercedes-Benz GLK-Class MPG & Fuel Cost
6 model years · 18–27 MPG combined
15,000 mi/yr · premium gasoline $5.36/gal (U.S. average, Sep 2026)
Cheaper to fuel than 1 of 10 small SUV configurations, MY2015. Ranked against all rated configurations, not sales-weighted.
2010-2015 Mercedes-Benz GLK-Class at a glance
The 2010-2015 Mercedes-Benz GLK-Class covers 6 model years in the EPA database (21 configurations in all), rated 18–27 MPG combined. The newest model year, 2015, costs about $3,440 a year to fuel for its most efficient version, the GLK250 Bluetec 4matic 2.1L 4-cyl turbo 4WD (27 MPG), at diesel $6.29/gal (U.S. average, Sep 2026). Powertrains over the years: gas and diesel. EPA changed the ratings in 2011, 2012, 2013, 2014 and 2015. The best combined rating in the generation, 27 MPG, was reached in 2013, 2014 and 2015.
2010-2015 Mercedes-Benz GLK-Class by model year
| Model year | Powertrains | Combined | $/yr | EPA ratings |
|---|---|---|---|---|
| 2015 | Gas, Diesel | 20–27 MPG | $3,440–$3,960 | Ratings changed |
| 2014 | Gas, Diesel | 21–27 MPG | $3,440–$3,890 | Ratings changed |
| 2013 | Gas, Diesel | 21–27 MPG | $3,440–$3,830 | Ratings changed |
| 2012 | Gas | 18 MPG | $4,370–$4,520 | Ratings changed |
| 2011 | Gas | 18 MPG | $4,360–$4,500 | Ratings changed |
| 2010 | Gas | 18 MPG | $4,460 | First year |
What the 2015 GLK350 3.5L 6-cyl RWD costs to drive
Per month
$310
$3,720 a year ÷ 12
Per 25 miles
$6.20
Per 100 miles
$24.80
Five years
$18,600
5 × the yearly cost, prices held at today's level
vs the small SUV median
$730more a year
Class median $2,990 a year, MY2015
Based on 15,000 miles a year and premium gasoline $5.36/gal (U.S. average, Sep 2026).
2015 Mercedes-Benz GLK-Class MPG
Versus 2014: The most efficient configuration stays at 27 MPG. Its annual cost stays at $3,440.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 3.5L 6-cyl RWD Automatic 7-spd (Most efficient) | 3.5L 6-cyl | RWD | 19 | 26 | 22 | $3,720 |
| GLK350 3.5L 6-cyl RWD Automatic 7-spd | 3.5L 6-cyl | RWD | 19 | 25 | 21 | $3,790 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 18 | 25 | 21 | $3,890 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 18 | 24 | 20 | $3,960 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Diesel configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK250 Bluetec 4matic (Most efficient) | 2.1L 4-cyl turbo | 4WD | 24 | 32 | 27 | $3,440 |
Diesel is priced at diesel $6.29/gal (U.S. average, Sep 2026).
2014 Mercedes-Benz GLK-Class MPG
21–27 MPG · $3,440–$3,890/yr
Versus 2013: The most efficient configuration stays at 27 MPG. Its annual cost stays at $3,440.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 3.5L 6-cyl RWD Automatic 7-spd (Most efficient) | 3.5L 6-cyl | RWD | 19 | 26 | 22 | $3,720 |
| GLK350 3.5L 6-cyl RWD Automatic 7-spd | 3.5L 6-cyl | RWD | 19 | 25 | 21 | $3,790 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 19 | 25 | 21 | $3,840 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 18 | 25 | 21 | $3,890 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Diesel configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK250 Bluetec 4matic (Most efficient) | 2.1L 4-cyl turbo | 4WD | 24 | 32 | 27 | $3,440 |
Diesel is priced at diesel $6.29/gal (U.S. average, Sep 2026).
2013 Mercedes-Benz GLK-Class MPG
21–27 MPG · $3,440–$3,830/yr
Versus 2012: The most efficient configuration moves from 18 to 27 MPG, up 9. Its annual cost goes from $4,370 to $3,440, $930 less.
Gas configurations (4)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 3.5L 6-cyl RWD Automatic 7-spd (Most efficient) | 3.5L 6-cyl | RWD | 19 | 25 | 21 | $3,740 |
| GLK350 3.5L 6-cyl RWD Automatic 7-spd | 3.5L 6-cyl | RWD | 19 | 25 | 21 | $3,770 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 19 | 24 | 21 | $3,830 |
| GLK350 4matic 3.5L 6-cyl 4WD Automatic 7-spd | 3.5L 6-cyl | 4WD | 19 | 24 | 21 | $3,830 |
4 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
Diesel configurations (1)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK250 Bluetec 4matic (Most efficient) | 2.1L 4-cyl turbo | 4WD | 24 | 32 | 27 | $3,440 |
Diesel is priced at diesel $6.29/gal (U.S. average, Sep 2026).
2012 Mercedes-Benz GLK-Class MPG
18 MPG · $4,370–$4,520/yr
Versus 2011: The most efficient configuration stays at 18 MPG. Its annual cost goes from $4,360 to $4,370, $10 more.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 (Most efficient) | 3.5L 6-cyl | RWD | 16 | 22 | 18 | $4,370 |
| GLK350 4matic | 3.5L 6-cyl | 4WD | 16 | 21 | 18 | $4,520 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2011 Mercedes-Benz GLK-Class MPG
18 MPG · $4,360–$4,500/yr
Versus 2010: The most efficient configuration stays at 18 MPG. Its annual cost goes from $4,460 to $4,360, $100 less.
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 (Most efficient) | 3.5L 6-cyl | RWD | 16 | 22 | 18 | $4,360 |
| GLK350 4matic | 3.5L 6-cyl | 4WD | 16 | 21 | 18 | $4,500 |
2 configurations require or recommend higher-octane gasoline and are costed at premium gasoline $5.36/gal (U.S. average, Sep 2026).
2010 Mercedes-Benz GLK-Class MPG
18 MPG · $4,460/yr
Gas configurations (2)
| Trim | Engine | Drive | City | Hwy | Comb. | $/yr |
|---|---|---|---|---|---|---|
| GLK350 4matic (Most efficient) | 3.5L 6-cyl | 4WD | 16 | 21 | 18 | $4,460 |
| GLK350 | 3.5L 6-cyl | RWD | 16 | 22 | 18 | $4,460 |
2 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 GLK350 3.5L 6-cyl RWD: $4,440 in California and $3,230 in Texas, a $1,210 difference.
- California $4,440
- Washington $4,170
- New York $3,670
- Florida $3,400
- Texas $3,230
Similar cars
Closest combined MPG among MY2015 small SUV models.
Generations
- 2010-2015
Frequently asked questions
What gas mileage does the 2010-2015 Mercedes-Benz GLK-Class get?
EPA rates the 2010-2015 Mercedes-Benz GLK-Class at 18–27 MPG combined across 21 configurations and 6 model years. The most efficient version, the 2015 GLK250 Bluetec 4matic 2.1L 4-cyl turbo 4WD, is rated 27 MPG (24 city, 32 highway). By powertrain: Gas: 18–22 MPG; Diesel: 27 MPG.
Which years had the best MPG in the 2010-2015 Mercedes-Benz GLK-Class?
The GLK250 Bluetec 4matic 2.1L 4-cyl turbo 4WD reached the generation's best combined rating, 27 MPG, in 2013, 2014 and 2015. The lowest top rating, 18 MPG, was in 2010, 2011 and 2012.
Did EPA ratings change during the 2010-2015 Mercedes-Benz GLK-Class?
Yes. Ratings changed in 2011, 2012, 2013, 2014 and 2015.
How much does it cost to fuel a 2015 Mercedes-Benz GLK-Class per year?
Driving 15,000 miles a year at premium gasoline $5.36/gal (U.S. average, Sep 2026), the GLK350 3.5L 6-cyl RWD costs about $3,720 a year. Across all 5 configurations the cost runs $3,440–$3,960 a year. That is a $520 difference between the cheapest and the costliest configuration.
How much does it cost to drive a 2015 Mercedes-Benz GLK-Class 100 miles?
About $24.80 per 100 miles for the GLK350 3.5L 6-cyl RWD at premium gasoline $5.36/gal (U.S. average, Sep 2026), and between $22.93 and $26.40 across all configurations. That is the annual cost over 15,000 miles divided by 150.
Is the 2015 Mercedes-Benz GLK-Class more efficient in the city or on the highway?
The GLK350 3.5L 6-cyl RWD is rated 19 city and 26 highway MPG, so it is more efficient on the highway, by 7 MPG.
How does the 2015 Mercedes-Benz GLK-Class compare with other small SUV configurations?
The GLK350 3.5L 6-cyl RWD costs about $3,720 a year to fuel, $730 more than the class median of $2,990, and less than 1 of 10 small SUV configurations. The comparison covers all 188 rated small SUV configurations for MY2015, not weighted by sales.
Is the 2015 Mercedes-Benz GLK-Class different from the 2014 model?
The most efficient configuration stays at 27 MPG. Its annual cost stays at $3,440. EPA lists 5 configurations for 2015 against 5 configurations for 2014. See the 2014 Mercedes-Benz GLK-Class for that year.