2018 Mercedes-Benz GLA-Class Gas Tank Size & Fuel Capacity
Fuel tank capacity
13.2–14.8gal · 50–56 L
The 2018 Mercedes-Benz GLA-Class has a fuel tank capacity of 13.2 to 14.8 gallons (50–56 liters), depending on the trim. The most common size is 13.2 gallons, used on 2 trims.
A full tank is good for roughly 409–436 highway miles or 304–326 miles around town, going by the EPA ratings.
14.8 gal · Smaller than 77% of 2018 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2018 Mercedes-Benz GLA-Class fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
All 3 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| GLA 250 4MATIC 4dr SUV AWD 2.0L 4cyl Turbo 7AM · AWD MPG 23 / 31Range 304 / 409 mi | 2.0L 4cyl Turbo 7AM | AWD | 13.2 gal50 L | 23 / 31 | 304 / 409 mi | |
| GLA 250 4dr SUV 2.0L 4cyl Turbo 7AM · FWD MPG 24 / 33Range 317 / 436 mi | 2.0L 4cyl Turbo 7AM | FWD | 13.2 gal50 L | 24 / 33 | 317 / 436 mi | |
| AMG GLA 45 4MATIC 4dr SUV AWD 2.0L 4cyl Turbo 7AM · AWD MPG 22 / 28Range 326 / 414 mi | 2.0L 4cyl Turbo 7AM | AWD | 14.8 gal56 L | 22 / 28 | 326 / 414 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 2018 Mercedes-Benz GLA-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 25 MPG, a full 14.8-gallon tank covers about 370 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 14.8 | 414 | 326 |
| 3/4 | 11.1 | 311 | 244 |
| 1/2 | 7.4 | 207 | 163 |
| 1/4 | 3.7 | 104 | 81 |
| 1/8 | 1.9 | 52 | 41 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 600 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
- 25–27 MPG
- Tailpipe CO2
- 322–361 g/mi
- EPA greenhouse score
- 5–6 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Mercedes-Benz GLA-Class
$69.70 to fill the 13.2-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 |
|---|---|---|---|---|
| 13.2 gal | Premium | $5.28 | $69.70 | $52.27 |
| 14.8 gal | Premium | $5.28 | $78.14 | $58.61 |
By region, 13.2-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $65.08 |
| Midwest | $5.37 | $70.88 |
| Gulf CoastLowest | $4.57 | $60.32 |
| Rocky Mountain | $5.12 | $67.58 |
| West Coast | $6.08 | $80.26 |
| CaliforniaHighest | $6.36 | $83.95 |
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
- 13.2-gallon tank$69.70
- 14.8-gallon tank$78.14
- A year of driving (15,000 mi)$3,168
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
GLA-Class tank size in other years
The 2018 GLA-Class uses the same 13.2–14.8 gal tank sizes as every GLA-Class since 2016.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2023 GLA-Class | 12.7 gal | 432 mi |
| 2022 GLA-Class | 12.7 gal | 432 mi |
| 2021 GLA-Class | 12.7 gal | 432 mi |
| 2020 GLA-Class | 14.8 gal | 503 mi |
| 2019 GLA-Class | 13.2–14.8 gal | 436 mi |
| 2018 GLA-Class | 13.2–14.8 gal | 436 mi |
| 2017 GLA-Class | 13.2–14.8 gal | 436 mi |
| 2016 GLA-Class | 13.2–14.8 gal | 462 mi |
| 2015 GLA-Class | 14.8 gal | 518 mi |
2018 Mercedes-Benz GLA-Class vs similar 2018 SUVs
At 14.8 gallons, the GLA-Class's largest tank ranks fourth of the five 2018 SUVs compared here. The Land Rover Range Rover Evoque carries the most (18.0 gal) and the INFINITI QX30 the least (14.8 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Land Rover Range Rover Evoque | 18.0 gal | 522 mi |
| Audi Q3 | 16.9 gal | 473 mi |
| BMW X2 | 16.1 gal | 515 mi |
| Mercedes-Benz GLA-Class | 13.2–14.8 gal | 436 mi |
| INFINITI QX30 | 13.2–14.8 gal | 444 mi |
Other 2018 SUVs of a similar size, one model per brand.
2018 Mercedes-Benz GLA-Class fuel system recalls
None of the 12 recalls NHTSA lists for the 2018 Mercedes-Benz GLA-Class involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2018 Mercedes-Benz GLA-Class?
The 2018 Mercedes-Benz GLA-Class holds between 13.2 and 14.8 gallons, depending on the trim. 13.2 gallons is the usual size; the 14.8-gallon tank comes on the AMG GLA 45 4MATIC 4dr SUV AWD (2.0L 4cyl Turbo 7AM).
How many gallons and liters does the 2018 Mercedes-Benz GLA-Class gas tank hold?
The 2018 Mercedes-Benz GLA-Class tank holds 50–56 liters, or 13.2–14.8 gallons in US gallons.
Which 2018 Mercedes-Benz GLA-Class has the biggest gas tank?
The 14.8-gallon tank is on the AMG GLA 45 4MATIC 4dr SUV AWD. The smallest tank, 13.2 gallons, is on the GLA 250 4MATIC 4dr SUV AWD.
Does AWD change the 2018 Mercedes-Benz GLA-Class gas tank?
Yes. AWD: 13.2–14.8 gal; FWD: 13.2 gal.
How far can a 2018 Mercedes-Benz GLA-Class go on a full tank?
About 409–436 miles on the highway and 304–326 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 2018 Mercedes-Benz GLA-Class go on a quarter tank?
About 104 highway miles or 81 in town from the 14.8-gallon tank, which has roughly 3.7 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Mercedes-Benz GLA-Class take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Mercedes-Benz GLA-Class?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 13.2-gallon tank from empty costs $69.70. It ranges from $60.32 in the Gulf Coast to $83.95 in California.
How much does a full tank of gas weigh in a 2018 Mercedes-Benz GLA-Class?
About 92 pounds for the 14.8-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Mercedes-Benz GLA-Class have a bigger gas tank than the INFINITI QX30?
No, they match: both top out at 14.8 gallons in 2018.
Has the 2018 Mercedes-Benz GLA-Class had a fuel pump or fuel system recall?
No. None of the 12 recalls NHTSA lists for the 2018 Mercedes-Benz GLA-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.