Against 407 other 4-cyl cars rated 2013–2015, the GLK-Class trails their 27.3 mpg average by 2.8 mpg, about $160 a year. Averaged over the years each was sold, the most economical engine since 2010, the 2.1L 4-cyl (2013–2015), does 27 mpg and the thirstiest, the 3.5L 6-cyl (2010–2015), 19.8: $517 a year apart.
Every Mercedes-Benz GLK-Class engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2.1L 4-cyl | 24 / 32 | 2013–2015 | $1,422 | |
| 3.5L 6-cyl | 17.5 / 23.8 | 2010–2015 | $1,939 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (2015) | $0.131 |
| Fuel per year | $1,567 |
| Fuel over five years | $7,835 |
| Against other 4-cyl cars, 2013–2015 | +$160 a year |
| EPA's own estimate | $3,583 a year |
City or highway — who is this car for
The 2015 Mercedes-Benz GLK-Class gives up 7.5 mpg in town: 29 on the highway against 21.5 in the city, $462 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2015) | 21.5 mpg | $1,786 a year if you only drive in town |
| Highway | 29 mpg | $1,324 a year if you mostly commute |
| Gap | +7.5 mpg (35%) | Wide — this car dislikes traffic |
How the GLK-Class changed over the years
The GLK-Class peaked in 2015 at 24.5 mpg (21.5 city, 29 highway) and was at its thirstiest in 2012 at 18 — 6.5 mpg apart, or $566 a year in fuel between buying one year and the other. The biggest single-year change came in 2013: 18 to 24 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2015 | 21.5 / 29 | 2 | $1,567 | |
| 2014 | 21.5 / 29 | 2 | $1,567 | |
| 2013 | 21.5 / 28.5 | 2 | $1,600 | |
| 2012 | 16 / 22 | 1 | $2,133 | |
| 2011 | 16 / 22 | 1 | $2,133 | |
| 2010 | 16 / 22 | 1 | $2,133 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 9 EPA ratings of the Mercedes-Benz GLK-Class — 2 engines across 2010–2015. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,583. Full method.
Frequently asked questions
What mpg does the 2015 Mercedes-Benz GLK-Class get?
24.5 mpg combined, 21.5 city and 29 highway, per EPA; its 2 versions that year range from 22 to 27. Across every year since 2010 the GLK-Class has averaged 22.2 mpg.
Is the 2015 GLK-Class more efficient than the 2014?
About the same: 24.5 against 24.5 mpg combined.
Which GLK-Class year has the best gas mileage?
The 2015, at 24.5 mpg combined (21.5 city, 29 highway), which is also the latest model year we hold.
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