2021 Mercedes-Benz CLS-Class
US · Compact Cars
The 2021 Mercedes-Benz CLS-Class is listed in the US market with hybrid power. Every figure below carries the source it came from, and anything our sources do not publish is left out rather than estimated.
- Engine
- Varies by configuration: 3.0L 6-cylinder (SIDI; Mild Hybrid), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid)
- Transmission
- 9-speed automatic
- Drivetrain
- Varies by configuration: 4WD, RWD
- Fuel
- Hybrid
- Economy
- 23 mpg (10.2 L/100 km) to 26 mpg (9.0 L/100 km) combined
Key Figures
Engine
| Specification | Value | Source |
|---|---|---|
| Engine | Varies by configuration: 3.0L 6-cylinder (SIDI; Mild Hybrid), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid) | |
| Displacement | 3.0 L | |
| Cylinders | 6 | |
| Aspiration | Turbocharged | |
| Fuel type | Hybrid | EPA fueleconomy.gov |
Transmission and drivetrain
| Specification | Value | Source |
|---|---|---|
| Transmission | Automatic | EPA fueleconomy.gov |
| Gears | 9 | |
| Drivetrain | Varies by configuration: 4WD, RWD |
Fuel economy and range
| Specification | Value | Source |
|---|---|---|
| Combined | 23 mpg (10.2 L/100 km) to 26 mpg (9.0 L/100 km) | EPA fueleconomy.gov |
| City | 21 mpg (11.2 L/100 km) to 23 mpg (10.2 L/100 km) | |
| Highway | 26 mpg (9.0 L/100 km) to 30 mpg (7.8 L/100 km) |
Our sources do not publish these for this vehicle: Power, Torque, Electric range, Battery capacity. We leave them out instead of estimating.
Trims and configurations
3 configurations listed by our sources. Engines, drivetrains and fuel economy can differ between them.
Recalls
No recall campaigns were found in NHTSA data at the last check. Last checked November 8, 2026.
Data sources
- EPA fueleconomy.gov · retrieved November 4, 2026 · US Government public data
- NHTSA vPIC · retrieved October 12, 2026 · US Government public data
Source checked: November 4, 2026
Data verified: November 4, 2026
Specifications can vary by market, trim, configuration and production date. Confirm with the manufacturer before buying parts or making safety decisions. Report an error.
Related vehicles
Varies by configuration: 3.0L 6-cylinder (SIDI; Mild Hybrid), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid) · Varies by configuration: 4WD, RWD
26 mpg (9.0 L/100 km) to 23 mpg (10.2 L/100 km)3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid) · 4WD
25 mpg (9.4 L/100 km)
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Frequently asked questions
What engine does the 2021 Mercedes-Benz CLS-Class have?
Varies by configuration: 3.0L 6-cylinder (SIDI; Mild Hybrid), 3.0L 6-cylinder turbocharged (SIDI; Mild Hybrid). Engines can differ by trim, so check the trim list below.
What is the fuel economy of the 2021 Mercedes-Benz CLS-Class?
Combined fuel economy is 23 mpg (10.2 L/100 km) to 26 mpg (9.0 L/100 km), as published by the source shown in the specification table.
Is the 2021 Mercedes-Benz CLS-Class front-wheel, rear-wheel or all-wheel drive?
Drivetrain: Varies by configuration: 4WD, RWD.
Are there recalls for the 2021 Mercedes-Benz CLS-Class?
No recall campaigns were found in NHTSA data when we last checked on November 8, 2026. Recall status can change, so confirm with NHTSA or the manufacturer.