2010 Mercedes-Benz CLS-Class Gas Tank Size & Fuel Capacity
Fuel tank capacity
21.1gal · 80 L
The 2010 Mercedes-Benz CLS-Class has a fuel tank capacity of 21.1 gallons (80 liters) on every trim.
A full tank is good for roughly 380–443 highway miles or 253–295 miles around town, going by the EPA ratings.
21.1 gal · Bigger than 64% of 2010 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- FAQ
2010 Mercedes-Benz CLS-Class fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 2 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| CLS550 4dr Sedan 5.5L 8cyl 7A · RWD MPG 14 / 21Range 295 / 443 mi | 5.5L 8cyl 7A | RWD | 21.1 gal80 L | 14 / 21 | 295 / 443 mi | |
| CLS63 AMG 4dr Sedan 6.2L 8cyl 7A · RWD MPG 12 / 18Range 253 / 380 mi | 6.2L 8cyl 7A | RWD | 21.1 gal80 L | 12 / 18 | 253 / 380 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 2010 Mercedes-Benz CLS-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 16 MPG, a full 21.1-gallon tank covers about 338 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 21.1 | 443 | 295 |
| 3/4 | 15.8 | 332 | 222 |
| 1/2 | 10.6 | 222 | 148 |
| 1/4 | 5.3 | 111 | 74 |
| 1/8 | 2.6 | 55 | 37 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 938 gallons, roughly 44 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
- 14–16 MPG
- Tailpipe CO2
- 555–635 g/mi
- Gas guzzler tax
- Yes
- Source
- EPA ratings
What it costs to fill up a 2010 Mercedes-Benz CLS-Class
$111.41 to fill the 21.1-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 |
|---|---|---|---|---|
| 21.1 gal | Premium | $5.28 | $111.41 | $83.56 |
By region, 21.1-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $104.02 |
| Midwest | $5.37 | $113.31 |
| Gulf CoastLowest | $4.57 | $96.43 |
| Rocky Mountain | $5.12 | $108.03 |
| West Coast | $6.08 | $128.29 |
| CaliforniaHighest | $6.36 | $134.20 |
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
- 21.1-gallon tank$111.41
- A year of driving (15,000 mi)$4,950
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
CLS-Class tank size in other years
The 2010 CLS-Class uses the same 21.1 gal tank as every CLS-Class since 2006.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2015 CLS-Class | 21.1 gal | 633 mi |
| 2014 CLS-Class | 21.1 gal | 528 mi |
| 2013 CLS-Class | 21.1 gal | 528 mi |
| 2012 CLS-Class | 21.1 gal | 528 mi |
| 2011 CLS-Class | 21.1 gal | 443 mi |
| 2010 CLS-Class | 21.1 gal | 443 mi |
| 2009 CLS-Class | 21.1 gal | 443 mi |
| 2008 CLS-Class | 21.1 gal | 443 mi |
| 2007 CLS-Class | 21.1 gal | 422 mi |
| 2006 CLS-Class | 21.1 gal | 401 mi |
2010 Mercedes-Benz CLS-Class vs similar 2010 sedans
The CLS-Class has the largest tank of the seven 2010 sedans compared here, 21.1 gallons against 21.1 for the Audi A6.
| 2010 model | Tank | Longest highway range |
|---|---|---|
| Mercedes-Benz CLS-Class | 21.1 gal | 443 mi |
| Audi A6 | 21.1 gal | 591 mi |
| INFINITI M45 | 20.0 gal | 420 mi |
| Jaguar XF | 18.4 gal | 460 mi |
| Cadillac CTS-V | 18.0 gal | 342 mi |
| Saab 9-5 | 18.0 gal | 486 mi |
| Lexus GS 450h | 17.2 gal | 430 mi |
Other 2010 sedans of a similar size, one model per brand.
2010 Mercedes-Benz CLS-Class fuel system recalls
None of the 3 recalls NHTSA lists for the 2010 Mercedes-Benz CLS-Class involve the fuel system.
Frequently asked questions
What is the fuel tank capacity of the 2010 Mercedes-Benz CLS-Class?
The 2010 Mercedes-Benz CLS-Class holds 21.1 gallons (80 liters) on every trim we list.
How many gallons and liters does the 2010 Mercedes-Benz CLS-Class gas tank hold?
The 2010 Mercedes-Benz CLS-Class tank holds 80 liters, or 21.1 gallons in US gallons.
How far can a 2010 Mercedes-Benz CLS-Class go on a full tank?
About 380–443 miles on the highway and 253–295 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 2010 Mercedes-Benz CLS-Class go on a quarter tank?
About 111 highway miles or 74 in town from the 21.1-gallon tank, which has roughly 5.3 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2010 Mercedes-Benz CLS-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 2010 Mercedes-Benz CLS-Class?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 21.1-gallon tank from empty costs $111.41. It ranges from $96.43 in the Gulf Coast to $134.20 in California.
How much does a full tank of gas weigh in a 2010 Mercedes-Benz CLS-Class?
About 131 pounds for the 21.1-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2010 Mercedes-Benz CLS-Class have a bigger gas tank than the Audi A6?
No, they match: both top out at 21.1 gallons in 2010.
Has the 2010 Mercedes-Benz CLS-Class had a fuel pump or fuel system recall?
No. None of the 3 recalls NHTSA lists for the 2010 Mercedes-Benz CLS-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.