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Mercedes-Benz CLS-Class Engine Specifications

The 2023 Mercedes-Benz CLS-Class is offered with 3.0L–5.5L engines in 6 and 8-cylinder form, per EPA fuel-economy records.

Latest model year (2023):

The Mercedes-Benz CLS-Class is available with 6 3.0L and Automatic 9-spd (All-Wheel Drive).

Verifiedfueleconomy.gov · Verified August 9, 2026
OverviewMPGEngine SpecsFuel CostTransmissionDrivetrainVehicle ClassMaintenanceDimensionsCurb Weight

Mercedes-Benz CLS-Class Engine Specs — All Years

YearTrimCylindersDispl.TransmissionDriveFuel TypeVehicle Class
2023Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spdAll-Wheel DrivePremium GasolineCompact Cars
2022Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2021Config 1 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2021Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2021Config 3 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2020Config 1 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2020Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2020Config 3 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2019Config 1 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2019Config 2 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2019Config 3 of 3Auto 9-spd, 6 cyl, 3.0 L63.0LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2018Config 1 of 3Auto 7-spd, 8 cyl, 5.5 L85.5LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2018Config 2 of 3Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2018Config 3 of 3Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2017Config 1 of 3Auto 7-spd, 8 cyl, 5.5 L85.5LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2017Config 2 of 3Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2017Config 3 of 3Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2016Config 1 of 5Auto 7-spd, 6 cyl, 3.0 L63.0LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2016Config 2 of 5Auto 7-spd, 6 cyl, 3.0 L63.0LAutomatic 7-spdRear-Wheel DrivePremium GasolineCompact Cars
2016Config 3 of 5Auto 7-spd, 8 cyl, 5.5 L85.5LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2016Config 4 of 5Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spd4-Wheel DrivePremium GasolineCompact Cars
2016Config 5 of 5Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars
2015Config 1 of 5Auto 7-spd, 6 cyl, 3.0 L63.0LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2015Config 2 of 5Auto 7-spd, 6 cyl, 3.0 L63.0LAutomatic 7-spdRear-Wheel DrivePremium GasolineCompact Cars
2015Config 3 of 5Auto 7-spd, 8 cyl, 4.7 L84.7LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2015Config 4 of 5Auto 7-spd, 8 cyl, 5.5 L85.5LAutomatic 7-spd4-Wheel DrivePremium GasolineCompact Cars
2015Config 5 of 5Auto 9-spd, 8 cyl, 4.7 L84.7LAutomatic 9-spdRear-Wheel DrivePremium GasolineCompact Cars

Data sourced from fueleconomy.gov (U.S. Department of Energy). MPG figures are EPA-tested. Fuel costs are estimates based on average fuel prices and 15,000 miles/year.

Mercedes-Benz CLS-Class data analysis

How Mercedes-Benz CLS-Class engine displacement varies

Across 27 configurations recorded for the 2015 through 2023 Mercedes-Benz CLS-Class, engine displacement runs from 3 litres to 5.5 litres. The strongest figure belongs to the 2023 Mercedes-Benz CLS-Class (SIDI; Mild Hybrid) at 3 litres, and the weakest to the 2015 car (SIDI) at 5.5 litres — a spread of 45%. A gap that wide means the model year and configuration you buy matter more than the nameplate does: quoting a single number for the Mercedes-Benz CLS-Class would be misleading.

What changed for 2023

Average engine displacement for the 2023 Mercedes-Benz CLS-Class is 3 litres, against 3 litres for the 2022 car — it held flat. A carry-over year like this usually means no powertrain or structural change, so an older example is the cheaper way into the same specification.

How to read this Mercedes-Benz CLS-Class data

This page lists every 2015 through 2023 Mercedes-Benz CLS-Class record we hold for this measurement — 27 rows in total, one per configuration and model year rather than a single headline figure. Figures are published as the source agency records them: we do not round, average or interpolate missing years, and a year that is absent from the table is a year with no published measurement rather than a zero. Where a manufacturer offered several drivetrains or body styles in the same year, each appears on its own row, because those variants rarely share the same numbers.

Configurations behind these Mercedes-Benz CLS-Class numbers

The 2015 through 2023 Mercedes-Benz CLS-Class entries here cover the variants SIDI; Mild Hybrid and SIDI. 2016 is the busiest model year in the record with 5 separate measured configurations, which is why a single quoted engine displacement figure for that year is rarely the one that matches the car in front of you. Match the row to the exact drivetrain, body style and engine on the window sticker or VIN before relying on the number, and use the comparison links below to see how those same configurations line up against rival models.

Where these Mercedes-Benz CLS-Class figures come from

Every value on this page is loaded from federal open data — EPA fuel economy submissions, NHTSA vehicle and crash-test records, and manufacturer specification filings — rather than dealer listings or copied editorial content. The Mercedes-Benz CLS-Class record refreshes as the agencies publish, which typically means new model-year rows appear in the autumn and crash-test results follow through the model year as vehicles are tested. Because certification data is filed per configuration, treat any single headline number for this vehicle with caution: the figure that applies to a specific car depends on its engine, drivetrain, body style and model year, all of which are listed separately above. If a number here disagrees with a brochure, the brochure is usually quoting the best available configuration rather than the one being sold.

Frequently Asked Questions About CLS-Class Engine Specs

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

The Mercedes-Benz CLS-Class is available with 6 cylinder engines ranging up to 3.0L. Transmission and drivetrain options vary by trim. See the full table above.

Is the Mercedes-Benz CLS-Class available with all-wheel drive?

Yes, the Mercedes-Benz CLS-Class is available with all-wheel drive. Check the "Drive" column in the table above for specific trims.

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