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2023 Mercedes-Benz CLS-Class Specs: MPG, Gas Mileage, Engine Size & Dimensions

2015–2023 model years27 variantsUp to 26 MPG combined
Real-World MPG QuestionsBed Dimensions & Cargo SpaceService Intervals

Mercedes-Benz CLS-Class maintenance schedule by model year

Verified year-by-year intervals for 2019–2019 are listed on the Mercedes-Benz CLS-Class maintenance schedule, where you can switch model year in the table.

2023 Mercedes-Benz CLS-Class Specs at a Glance

The 2023 Mercedes-Benz CLS-Class gets 25 mpg combined on the 3.0L All-Wheel Drive configuration, weighs 4,277 lbs, measures 196.9 in long. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.

Combined MPG
25 mpg (22 city / 30 hwy)
Best configuration: 3.0L · All-Wheel Drive · Automatic 9-spd
Engine
3.0L 6-cyl
3.0L · All-Wheel Drive · Automatic 9-spd
Curb weight
4,277 lbs
Heaviest recorded configuration: CLS CLASS CLS 550 4MATIC 4DR SEDAN
Length
196.9 in · 74 in wide · 55.9 in tall
Wheelbase
113 in

2023 Mercedes-Benz CLS-Class trims and MPG

TrimEngineTransDriveCityHwyCombined
Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spdAll-Wheel Drive223025

Detailed Specifications

MPG & Fuel Economy

MPG for every year and trim

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Engine Specifications

Engine Specs for every year and trim

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Annual Fuel Cost

Fuel Cost for every year and trim

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Transmission Specifications

Transmission for every year and trim

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Drivetrain & Drive Type

Drivetrain for every year and trim

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Vehicle Class & EPA Size Category

Vehicle Class for every year and trim

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Maintenance Schedule & Service Intervals

Maintenance for every year and trim

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Dimensions & Size

Dimensions for every year and trim

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Curb Weight

Curb Weight for every year and trim

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Mercedes-Benz CLS-Class Generations

Grouped by year ranges where the engine lineup, drivetrain options, and EPA class stay consistent — a derived approximation of the factory generations, not a manufacturer-published list.

YearsVariantsEnginesDriveClassBest MPG
2019–2023113.0L4-Wheel Drive, All-Wheel Drive, Rear-Wheel DriveCompact Cars26
2015–2018163.0L, 4.7L, 5.5L4-Wheel Drive, Rear-Wheel DriveCompact Cars24

Mercedes-Benz CLS-Class — All Years Overview

YearTrimEngineTransDriveCityHwyCombinedFuel
2023Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spdAll-Wheel Drive223025Premium Gasoline
2022Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive223025Premium Gasoline
2021Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive212623Premium Gasoline
2021Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spdRear-Wheel Drive233026Premium Gasoline
2021Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive222925Premium Gasoline
2020Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive233026Premium Gasoline
2020Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive212723Premium Gasoline
2020Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spdRear-Wheel Drive243126Premium Gasoline
2019Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive212723Premium Gasoline
2019Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spdRear-Wheel Drive243126Premium Gasoline
2019Auto 9-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 9-spd4-Wheel Drive233026Premium Gasoline
2018Auto 7-spd, 8 cyl, 5.5 L8 · 5.5LAutomatic 7-spd4-Wheel Drive162218Premium Gasoline
2018Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spd4-Wheel Drive172520Premium Gasoline
2018Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spdRear-Wheel Drive182621Premium Gasoline
2017Auto 7-spd, 8 cyl, 5.5 L8 · 5.5LAutomatic 7-spd4-Wheel Drive162218Premium Gasoline
2017Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spdRear-Wheel Drive182621Premium Gasoline
2017Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spd4-Wheel Drive172520Premium Gasoline
2016Auto 7-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 7-spd4-Wheel Drive192622Premium Gasoline
2016Auto 7-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 7-spdRear-Wheel Drive203024Premium Gasoline
2016Auto 7-spd, 8 cyl, 5.5 L8 · 5.5LAutomatic 7-spd4-Wheel Drive162218Premium Gasoline
2016Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spd4-Wheel Drive172520Premium Gasoline
2016Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spdRear-Wheel Drive182620Premium Gasoline
2015Auto 7-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 7-spd4-Wheel Drive192622Premium Gasoline
2015Auto 7-spd, 6 cyl, 3.0 L6 · 3.0LAutomatic 7-spdRear-Wheel Drive202924Premium Gasoline
2015Auto 7-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 7-spd4-Wheel Drive172419Premium Gasoline
2015Auto 7-spd, 8 cyl, 5.5 L8 · 5.5LAutomatic 7-spd4-Wheel Drive162218Premium Gasoline
2015Auto 9-spd, 8 cyl, 4.7 L8 · 4.7LAutomatic 9-spdRear-Wheel Drive182620Premium Gasoline

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Mercedes-Benz CLS-Class — Frequently Asked Questions

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

The Mercedes-Benz CLS-Class is EPA-rated at up to 26 MPG combined (23 city / 30 highway), a historical peak recorded on the 2021 model year.

What engine does the 2023 Mercedes-Benz CLS-Class have?

The Mercedes-Benz CLS-Class uses a 3.0L 6-cylinder engine paired with an Automatic 9-spd transmission.

What years of the Mercedes-Benz CLS-Class are covered here?

This page documents 27 verified Mercedes-Benz CLS-Class configurations across model years 2015–2023.

Which model year of the Mercedes-Benz CLS-Class is the most fuel efficient?

The 2021 Mercedes-Benz CLS-Class holds the highest combined rating at 26 MPG; the 2017 sits lowest at 21 MPG, a difference of 5 MPG (about 24%) across the 9 rated years on file.

How many engine options does the Mercedes-Benz CLS-Class have?

The records list 3 distinct displacements for the Mercedes-Benz CLS-Class — 3L, 4.7L, 5.5L — which is why combined MPG varies between trims of the same year.

Is the 2023 Mercedes-Benz CLS-Class front-wheel drive or all-wheel drive?

The Mercedes-Benz CLS-Class appears in 3 drivetrain layouts across the years documented here — All-Wheel Drive, 4-Wheel Drive, Rear-Wheel Drive — with the latest 2023 record on All-Wheel Drive.

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