2014 Mercedes-Benz GLK-Class Gas Tank Size & Fuel Capacity
Fuel tank capacity
15.6–17.4gal · 59–66 L
The 2014 Mercedes-Benz GLK-Class has a fuel tank capacity of 15.6 to 17.4 gallons (59–66 liters), depending on the trim. The most common size is 17.4 gallons, used on 2 trims.
A full tank is good for roughly 418–515 highway miles or 331–374 miles around town, going by the EPA ratings.
17.4 gal · Smaller than 61% of 2014 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2014 Mercedes-Benz GLK-Class fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Powertrain
- Drive
- Engine
All 3 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | Fuel | MPG city / hwy | Range city / hwy |
|---|---|---|---|---|---|---|
| GLK250 BlueTEC 4MATIC 4dr SUV AWD 2.1L 4cyl Turbodiesel 7A · AWD · Diesel Diesel MPG 24 / 33Range 374 / 515 mi | 2.1L 4cyl Turbodiesel 7A Diesel | AWD | 15.6 gal59 L | Diesel | 24 / 33 | 374 / 515 mi |
| GLK350 4MATIC 4dr SUV AWD 3.5L 6cyl 7A · AWD · Premium (required) MPG 19 / 24Range 331 / 418 mi | 3.5L 6cyl 7A | AWD | 17.4 gal66 L | Premiumrequired | 19 / 24 | 331 / 418 mi |
| GLK350 4dr SUV 3.5L 6cyl 7A · RWD · Premium (required) MPG 19 / 25Range 331 / 435 mi | 3.5L 6cyl 7A | RWD | 17.4 gal66 L | Premiumrequired | 19 / 25 | 331 / 435 mi |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 2014 Mercedes-Benz GLK-Class goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 21 MPG, a full 17.4-gallon tank covers about 365 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.4 | 418 | 331 |
| 3/4 | 13.1 | 313 | 248 |
| 1/2 | 8.7 | 209 | 165 |
| 1/4 | 4.4 | 104 | 83 |
| 1/8 | 2.2 | 52 | 41 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 714 gallons, roughly 41 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
- EPA combined
- 21 MPG
- Tailpipe CO2
- 420–426 g/mi
- EPA greenhouse score
- 5 of 10
- Source
- EPA ratings
What it costs to fill up a 2014 Mercedes-Benz GLK-Class
$91.87 to fill the 17.4-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 17.4 gal | Premium | $5.28 | $91.87 | $68.90 |
| 15.6 gal | Diesel | $6.35 | $99.06 | $74.29 |
By region, 17.4-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $85.78 |
| Midwest | $5.37 | $93.44 |
| Gulf CoastLowest | $4.57 | $79.52 |
| Rocky Mountain | $5.12 | $89.09 |
| West Coast | $6.08 | $105.79 |
| CaliforniaHighest | $6.36 | $110.66 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 15.6-gallon tank$82.37
- 17.4-gallon tank$91.87
- A year of driving (15,000 mi)$3,771
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
GLK-Class tank size in other years
The 2014 GLK-Class uses the same 15.6–17.4 gal tank sizes as the 2013 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2015 GLK-Class | 15.6–17.4 gal | 515 mi |
| 2014 GLK-Class | 15.6–17.4 gal | 515 mi |
| 2013 GLK-Class | 15.6–17.4 gal | 515 mi |
| 2012 GLK-Class | 17.4 gal | 383 mi |
| 2011 GLK-Class | 17.4 gal | 400 mi |
| 2010 GLK-Class | 17.4 gal | 383 mi |
2014 Mercedes-Benz GLK-Class vs similar 2014 SUVs
At 17.4 gallons, the GLK-Class's largest tank ranks sixth of the seven 2014 SUVs compared here. The Audi SQ5 carries the most (19.8 gal) and the Acura RDX the least (16.0 gal).
| 2014 model | Tank | Longest highway range |
|---|---|---|
| Audi SQ5 | 19.8 gal | 455 mi |
| Lincoln MKX | 18.3–19.2 gal | 476 mi |
| Land Rover LR2 | 18.5 gal | 444 mi |
| Volvo XC60 | 18.5 gal | 481 mi |
| BMW X3 | 17.7 gal | 496 mi |
| Mercedes-Benz GLK-Class | 15.6–17.4 gal | 515 mi |
| Acura RDX | 16.0 gal | 448 mi |
Other 2014 SUVs of a similar size, one model per brand.
2014 Mercedes-Benz GLK-Class fuel system recalls
None of the 6 recalls NHTSA lists for the 2014 Mercedes-Benz GLK-Class involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2014 Mercedes-Benz GLK-Class?
The 2014 Mercedes-Benz GLK-Class holds between 15.6 and 17.4 gallons, depending on the trim. 17.4 gallons is the usual size; the smaller 15.6-gallon tank is on the GLK250 BlueTEC 4MATIC 4dr SUV AWD.
How many gallons and liters does the 2014 Mercedes-Benz GLK-Class gas tank hold?
The 2014 Mercedes-Benz GLK-Class tank holds 59–66 liters, or 15.6–17.4 gallons in US gallons.
Which 2014 Mercedes-Benz GLK-Class has the biggest gas tank?
The 17.4-gallon tank is on the GLK350 4MATIC 4dr SUV AWD, GLK350 4dr SUV. The smallest tank, 15.6 gallons, is on the GLK250 BlueTEC 4MATIC 4dr SUV AWD.
Does the 2014 Mercedes-Benz GLK-Class tank change with the powertrain?
Yes. Diesel: 15.6 gal; Gas: 17.4 gal.
Does AWD change the 2014 Mercedes-Benz GLK-Class gas tank?
Yes. AWD: 15.6–17.4 gal; RWD: 17.4 gal.
How far can a 2014 Mercedes-Benz GLK-Class go on a full tank?
About 418–515 miles on the highway and 331–374 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2014 Mercedes-Benz GLK-Class go on a quarter tank?
About 104 highway miles or 83 in town from the 17.4-gallon tank, which has roughly 4.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2014 Mercedes-Benz GLK-Class take?
Premium unleaded (required), or Diesel fuel, depending on the engine. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2014 Mercedes-Benz GLK-Class?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 17.4-gallon tank from empty costs $91.87. It ranges from $79.52 in the Gulf Coast to $110.66 in California.
How much does a full tank of gas weigh in a 2014 Mercedes-Benz GLK-Class?
About 108 pounds for the 17.4-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2014 Mercedes-Benz GLK-Class have a bigger gas tank than the Land Rover LR2?
No. The 2014 Land Rover LR2 holds up to 18.5 gallons; the 2014 Mercedes-Benz GLK-Class holds up to 17.4.
Has the 2014 Mercedes-Benz GLK-Class had a fuel pump or fuel system recall?
No. None of the 6 recalls NHTSA lists for the 2014 Mercedes-Benz GLK-Class involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (Mercedes-Benz fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.