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2023 Mercedes-Benz CLS-Class Gas Tank Size and Capacity

Sedan 1 trim listed 1 fuel-system recall ← 2022

Fuel tank capacity

21.1gal · 80 L

The 2023 Mercedes-Benz CLS-Class has a fuel tank capacity of 21.1 gallons (80 liters).

A full tank is good for roughly 633 highway miles or 464 miles around town, going by the EPA ratings.

21.1 gal · Bigger than 70% of 2023 models we list.

Highway range
633 mi
City range
464 mi
Fuel
Premium unleaded (required)
Tank sizes
1
Trims
1

2023 Mercedes-Benz CLS-Class fuel tank capacity by trim

MPG and range are city / highway.

TrimEngineDrive Tank MPG city / hwy Range city / hwy
CLS 450 4MATIC 4dr Sedan AWD 3.0L 6cyl Turbo mild hybrid 9A · AWD MPG 22 / 30Range 464 / 633 mi 3.0L 6cyl Turbo mild hybrid 9A AWD 21.1 gal80 L 22 / 30 464 / 633 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 2023 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 25 MPG, a full 21.1-gallon tank covers about 528 miles.

GaugeGallonsHighway milesCity miles
Full21.1633464
3/415.8475348
1/210.6317232
1/45.3158116
1/82.67958

Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 600 gallons, roughly 28 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.

What it costs to fill up a 2023 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.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
21.1 galPremium$5.28$111.41$83.56

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

  • 21.1-gallon tank$111.41
  • 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.

CLS-Class tank size in other years

The 2023 CLS-Class uses the same 21.1 gal tank as every CLS-Class since 2006.

Model yearTankLongest highway range
2023 CLS-Class 21.1 gal 633 mi
2022 CLS-Class 21.1 gal 633 mi
2021 CLS-Class 21.1 gal 633 mi
2020 CLS-Class 21.1 gal 654 mi
2019 CLS-Class 21.1 gal 654 mi
2018 CLS-Class 21.1 gal 549 mi
Mercedes-Benz CLS-Class fuel tank by model year
2006200720082009201020112012201320142015201620172018201920202021202221.12023
← 2022 Mercedes-Benz CLS-Class Every CLS-Class year

2023 Mercedes-Benz CLS-Class vs similar 2023 sedans

At 21.1 gallons, the CLS-Class's largest tank ranks second of the seven 2023 sedans compared here. The Porsche Panamera carries the most (23.7 gal) and the Acura TLX the least (15.9 gal).

2023 modelTankLongest highway range
Porsche Panamera 21.1–23.7 gal 569 mi
Mercedes-Benz CLS-Class 21.1 gal 633 mi
Genesis G80 17.2–19.3 gal 550 mi
Audi A6 19.3 gal 598 mi
BMW 8 Series Gran Coupe 18.0 gal 522 mi
Volvo S90 15.9 gal 525 mi
Acura TLX 15.9 gal 493 mi

Picked by body style and size: other 2023 sedans within about 5% of the CLS-Class's length and 15% of its curb weight, one model per brand.

2023 Mercedes-Benz CLS-Class fuel system recalls

NHTSA lists 1 fuel-system recall for the 2023 Mercedes-Benz CLS-Class, out of 3 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.

Delivery · Fuel pumpJun 26, 2023 · NHTSA 23V445000 · Mercedes-Benz USA, LLC · 143,551 vehicles

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.

Risk and remedy

Risk: A loss of drive power can increase the risk of a crash.

Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2023070012.

Check your VIN at NHTSA ↗ Look up your tank by VIN

Frequently asked questions

What is the fuel tank capacity of the 2023 Mercedes-Benz CLS-Class?

The 2023 Mercedes-Benz CLS-Class holds 21.1 gallons (80 liters).

How many gallons and liters does the 2023 Mercedes-Benz CLS-Class gas tank hold?

The 2023 Mercedes-Benz CLS-Class tank holds 80 liters, or 21.1 gallons in US gallons.

How far can a 2023 Mercedes-Benz CLS-Class go on a full tank?

About 633 miles on the highway and 464 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 2023 Mercedes-Benz CLS-Class go on a quarter tank?

About 158 highway miles or 116 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 2023 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 2023 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 2023 Mercedes-Benz CLS-Class?

About 131 pounds for the 21.1-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.

Does the 2023 Mercedes-Benz CLS-Class have a bigger gas tank than the BMW 8 Series Gran Coupe?

Yes. The 2023 Mercedes-Benz CLS-Class holds up to 21.1 gallons; the 2023 BMW 8 Series Gran Coupe holds up to 18.0.

Has the 2023 Mercedes-Benz CLS-Class had a fuel pump or fuel system recall?

Yes. NHTSA lists 1 fuel-system recall for the 2023 Mercedes-Benz CLS-Class: 23V445000 (delivery · fuel pump). Check your VIN at nhtsa.gov/recalls to see if your car is affected.

Sources

  • Tank sizes: manufacturer-rated capacities from US-market specifications, cross-checked against a second spec database. Updated October 2026.
  • MPG and range: EPA ratings. Range is tank size times EPA MPG.
  • Fuel prices: U.S. Energy Information Administration, week of October 26, 2026.
  • Recalls: NHTSA recall database.

Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.

Other 2023 Mercedes-Benz models

AMG® GT21.1 gallons C-Class17.4 gallons CLA-Class13.5 gallons E-Class17.4–21.1 gallons G-Class26.4 gallons GLA-Class12.7 gallons GLB-Class15.9 gallons GLC-Class17.4 gallons GLC-Class Coupe17.4 gallons GLE-Class22.5 gallons GLE-Class Coupe22.5 gallons GLS-Class23.8 gallons