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2015 Mercedes-Benz S-Class Gas Tank Size & Fuel Capacity

Sedan 9 trims listed 2 fuel-system recalls ← 2014 2016 →

Fuel tank capacity

20.6–21.9gal · 78–83 L

The 2015 Mercedes-Benz S-Class has a fuel tank capacity of 20.6 to 21.9 gallons (78–83 liters), depending on the trim. The most common size is 21.1 gallons, used on 6 trims.

A full tank is good for roughly 422–618 highway miles or 253–494 miles around town, going by the EPA ratings.

21.9 gal · Bigger than 77% of 2015 models we list.

Highway range
422–618 mi
City range
253–494 mi
Fuel
Premium unleaded (required)
EPA combined
15–26 MPG
EPA size class
Large Cars

2015 Mercedes-Benz S-Class fuel tank capacity by trim

What changes the tank sizeTap an option to filter the table

Powertrain
Drive
Engine

All 9 trims

MPG and range are city / highway.

TrimEngineDrive Tank MPG city / hwy Range city / hwy
S 550 Plug-In HYBRID 4dr Sedan 3.0L 6cyl Turbo 7A · RWD Plug-in hybrid MPG 24 / 30Range 494 / 618 mi 3.0L 6cyl Turbo 7A Plug-in hybrid RWD 20.6 gal78 L 24 / 30 494 / 618 mi
S 550 4MATIC 2dr Coupe AWD 4.7L 8cyl Turbo 7A · AWD MPG 16 / 24Range 338 / 506 mi 4.7L 8cyl Turbo 7A AWD 21.1 gal80 L 16 / 24 338 / 506 mi
S 600 4dr Sedan 6.0L 12cyl Turbo 7A · RWD MPG 12 / 21Range 253 / 443 mi 6.0L 12cyl Turbo 7A RWD 21.1 gal80 L 12 / 21 253 / 443 mi
S 63 AMG 4MATIC 2dr Coupe AWD 5.5 8cyl Turbo 7A · AWD MPG 15 / 23Range 317 / 485 mi 5.5 8cyl Turbo 7A AWD 21.1 gal80 L 15 / 23 317 / 485 mi
S 63 AMG 4MATIC 4dr Sedan AWD 5.5L 8cyl Turbo 7A · AWD MPG 15 / 23Range 317 / 485 mi 5.5L 8cyl Turbo 7A AWD 21.1 gal80 L 15 / 23 317 / 485 mi
S 65 AMG 2dr Coupe 6.0L 12cyl Turbo 7A · RWD MPG 13 / 20Range 274 / 422 mi 6.0L 12cyl Turbo 7A RWD 21.1 gal80 L 13 / 20 274 / 422 mi
S 65 AMG 4dr Sedan 6.0L 12cyl Turbo 7A · RWD MPG 13 / 20Range 274 / 422 mi 6.0L 12cyl Turbo 7A RWD 21.1 gal80 L 13 / 20 274 / 422 mi
S 550 4MATIC 4dr Sedan AWD 4.7L 8cyl Turbo 7A · AWD MPG 16 / 26Range 350 / 569 mi 4.7L 8cyl Turbo 7A AWD 21.9 gal83 L 16 / 26 350 / 569 mi
S 550 4dr Sedan 4.7L 8cyl Turbo 7A · RWD MPG 17 / 26Range 372 / 569 mi 4.7L 8cyl Turbo 7A RWD 21.9 gal83 L 17 / 26 372 / 569 mi

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 2015 Mercedes-Benz S-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 18 MPG, a full 21.1-gallon tank covers about 380 miles.

GaugeGallonsHighway milesCity miles
Full21.1485317
3/415.8364237
1/210.6243158
1/45.312179
1/82.66140

Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 39 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
15–26 MPG
Tailpipe CO2
227–585 g/mi
EPA greenhouse score
3–9 of 10
Gas guzzler tax
Yes
Source
EPA ratings

What it costs to fill up a 2015 Mercedes-Benz S-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.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
20.6 galPremium$5.28$108.77$81.58
21.1 galPremium$5.28$111.41$83.56
21.9 galPremium$5.28$115.63$86.72

By region, 21.1-gallon tank

RegionPremium / galFill 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

  • 20.6-gallon tank$108.77
  • 21.1-gallon tank$111.41
  • 21.9-gallon tank$115.63
  • A year of driving (15,000 mi)$4,400

Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.

S-Class tank size in other years

The tank changed for 2015: 20.6–21.9 gal, against 21.1 gal on the 2014 S-Class.

Model yearTankLongest highway range
2020 S-Class 21.1–24.3 gal 591 mi
2019 S-Class 21.1–24.3 gal 591 mi
2018 S-Class 21.1–24.6 gal 644 mi
2017 S-Class 16.6–24.6 gal 598 mi
2016 S-Class 20.6–21.9 gal 618 mi
2015 S-Class 20.6–21.9 gal 618 mi
2014 S-Class 21.1 gal 549 mi
2013 S-Class 21.9–23.8 gal 679 mi
2012 S-Class 21.1–23.8 gal 738 mi
2011 S-Class 21.1–23.8 gal 595 mi
2010 S-Class 23.8 gal 595 mi
Mercedes-Benz S-Class fuel tank by model yearSmallest tank Larger tank options
199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026
← 2014 Mercedes-Benz S-Class Every S-Class year 2016 Mercedes-Benz S-Class →

2015 Mercedes-Benz S-Class vs similar 2015 sedans

At 21.9 gallons, the S-Class's largest tank ranks second of the seven 2015 sedans compared here. The Porsche Panamera carries the most (26.4 gal) and the Lincoln MKS the least (19.0 gal).

2015 modelTankLongest highway range
Porsche Panamera 21.1–26.4 gal 713 mi
Mercedes-Benz S-Class 20.6–21.9 gal 618 mi
Audi S8 21.7 gal 586 mi
Jaguar XJ 21.7 gal 586 mi
BMW ALPINA B7 21.1 gal 528 mi
Cadillac XTS 19.0–20.0 gal 532 mi
Lincoln MKS 19.0 gal 532 mi

Other 2015 sedans of a similar size, one model per brand.

2015 Mercedes-Benz S-Class fuel system recalls

NHTSA lists 2 fuel-system recalls for the 2015 Mercedes-Benz S-Class, out of 9 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.

DeliveryOct 14, 2015 · NHTSA 15V652000 · Mercedes-Benz USA, LLC. · 3,177 vehicles

Mercedes-Benz USA LLC (Mercedes-Benz) is recalling certain model year 2014 S63 AMG sedans and 2015-2016 S63 AMG 4Matic sedans and coupes manufactured May 14, 2013, to September 18, 2015. In the affected vehicles, due to a software error within the engine control unit, the vehicle may stall when coasting to a stop, such as at a traffic light.

Risk and remedy

Risk: The vehicle stall may be interpreted by the driver to be a planned shut-down as part of the ECO-Start-function. However, the engine will not restart automatically after releasing the brake pedal, immobilizing the vehicle and increasing the risk of a crash.

Remedy: Mercedes-Benz will notify owners, and dealers will update the engine control unit software, free of charge. The recall BEGAN ON DECEMBER 2, 2015. Owners may contact Mercedes-Benz customer service at 1-800-367-6372. Mercedes-Benz's number for this recall is 2015100003.

DeliveryOct 13, 2015 · NHTSA 15V647000 · Mercedes-Benz USA, LLC. · 4 vehicles

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2015 S550 Hybrid vehicles manufactured May 13, 2013 to April 22, 2015. In the affected vehicles, after driving in electric mode, the fuel pump output may be insufficient to restart the gasoline engine and the vehicle will stall.

Risk and remedy

Risk: A vehicle stall increases the risk of a crash.

Remedy: MBUSA will notify owners, and dealers will update the fuel system control unit software, free of charge. The recall is expected to begin in November 2015. Owners may contact Mercedes-Benz customer service at 1-800-367-6372.

All Mercedes-Benz fuel recalls Look up your tank by VIN

Frequently asked questions

What is the fuel tank capacity of the 2015 Mercedes-Benz S-Class?

The 2015 Mercedes-Benz S-Class holds between 20.6 and 21.9 gallons, depending on the trim. 21.1 gallons is the usual size; the 21.9-gallon tank comes on the S 550 4MATIC 4dr Sedan AWD (4.7L 8cyl Turbo 7A).

How many gallons and liters does the 2015 Mercedes-Benz S-Class gas tank hold?

The 2015 Mercedes-Benz S-Class tank holds 78–83 liters, or 20.6–21.9 gallons in US gallons.

Which 2015 Mercedes-Benz S-Class has the biggest gas tank?

The 21.9-gallon tank is on the S 550 4MATIC 4dr Sedan AWD, S 550 4dr Sedan. The smallest tank, 20.6 gallons, is on the S 550 Plug-In HYBRID 4dr Sedan.

Does the 2015 Mercedes-Benz S-Class tank change with the powertrain?

Yes. Plug-in hybrid: 20.6 gal; Gas: 21.1–21.9 gal.

Does AWD change the 2015 Mercedes-Benz S-Class gas tank?

Yes. RWD: 20.6–21.9 gal; AWD: 21.1–21.9 gal.

How far can a 2015 Mercedes-Benz S-Class go on a full tank?

About 422–618 miles on the highway and 253–494 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 2015 Mercedes-Benz S-Class go on a quarter tank?

About 121 highway miles or 79 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 2015 Mercedes-Benz S-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 2015 Mercedes-Benz S-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 2015 Mercedes-Benz S-Class?

About 136 pounds for the 21.9-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2015 Mercedes-Benz S-Class have a bigger gas tank than the BMW ALPINA B7?

Yes. The 2015 Mercedes-Benz S-Class holds up to 21.9 gallons; the 2015 BMW ALPINA B7 holds up to 21.1.

Has the 2015 Mercedes-Benz S-Class had a fuel pump or fuel system recall?

Yes. NHTSA lists 2 fuel-system recalls for the 2015 Mercedes-Benz S-Class: 15V652000 (delivery); 15V647000 (delivery). Check your VIN at nhtsa.gov/recalls to see if your car is affected.

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.

Other 2015 Mercedes-Benz models

C-Class17.4–18.0 gallons CLA-Class13.1–14.8 gallons CLS-Class21.1 gallons E-Class17.4–21.1 gallons G-Class25.4 gallons GL-Class26.4 gallons GLA-Class14.8 gallons GLK-Class15.6–17.4 gallons M-Class24.6 gallons SL-Class19.8 gallons SLK-Class18.5 gallons SLS AMG® GT Final Edition22.5 gallons