Mercedes-Benz CLA-Class vs Nissan LEAF: Specs Compared

Also searched as Nissan LEAF vs Mercedes-Benz CLA-Class specs — both orientations show this same side-by-side comparison.

The Mercedes-Benz CLA-Class is the more efficient of the two: it reaches 126 mpg combined versus 121 mpg for the Nissan LEAF, a 5 mpg advantage and costs about $50 less per year to fuel.

Across 4 measured categories, the Mercedes-Benz CLA-Class leads in 3. Figures are EPA test data, not manufacturer claims.

2015–2027

Mercedes-Benz CLA-Class

Compact Cars · 55 configurations

126mpg combined (best)
All Mercedes-Benz CLA-Class specs

2015–2026

Nissan LEAF

Midsize Cars · 26 configurations

121mpg combined (best)
All Nissan LEAF specs

Head-to-head specifications

MetricMercedes-Benz CLA-ClassNissan LEAF
Best combined MPG126 mpg ✓121 mpg
Best city MPG127 mpg131 mpg ✓
Best highway MPG124 mpg ✓111 mpg
Lowest annual fuel costEPA estimate at 15,000 miles per year$600 ✓$650
Lowest CO2 output273 g/miNot available
Engines offeredSIDI; Mild Hybrid, SIDI, SIDI; FFVNot available
TransmissionsAutomatic (A2), Automatic (A1), Automatic (AM8)Automatic (A1)
DrivetrainsAll-Wheel Drive, Rear-Wheel Drive, Front-Wheel DriveFront-Wheel Drive
Fuel typesElectricity, Premium, Premium or E85Electricity
EPA classCompact CarsMidsize Cars
Years covered2015–20272015–2026
Configurations on record5526

Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.

Mercedes-Benz CLA-Class vs Nissan LEAF dimensions and size

The Mercedes-Benz CLA-Class is 11 inches longer than the Nissan LEAF on a wheelbase 1.6 inches longer, and 383.6 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.

Mercedes-Benz CLA-Class versus Nissan LEAF exterior dimensions
DimensionMercedes-Benz CLA-Class (2026)Nissan LEAF (2026)Difference
Length184.6 in173.6 in11 in
Width (excl. mirrors)72 in71.3 in0.8 in
Height56.3 in61.4 in5.1 in
Wheelbase107.5 in105.9 in1.6 in
Curb weight4,597 lbs4,213 lbs384 lbs

Width excludes mirrors; add 8–12 inches for mirrors out. Figures are for the newest model year on record for each vehicle. See both drawn to scale.

Mercedes-Benz CLA-Class vs Nissan LEAF: what the numbers mean

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Mercedes-Benz CLA-Class burns about $600 of fuel annually against $650 for the Nissan LEAF. That $50 yearly gap compounds to roughly $250 over five years and $400 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.

City versus highway split: the Nissan LEAF is the stronger commuter at 131 mpg city, while the Mercedes-Benz CLA-Class pulls ahead on the interstate at 124 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.

Powertrain choice: the Mercedes-Benz CLA-Class is recorded with 3 distinct engine configurations (SIDI; Mild Hybrid, SIDI, SIDI; FFV), the Nissan LEAF with no. Across 55 recorded Mercedes-Benz CLA-Class configurations and 26 for the Nissan LEAF, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.

Drivetrain and class: the Mercedes-Benz CLA-Class is offered with All-Wheel Drive, Rear-Wheel Drive, Front-Wheel Drive, the Nissan LEAF with Front-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Compact Cars and Midsize Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.

CLA-Class vs LEAF: common questions

Which is better on gas, the Mercedes-Benz CLA-Class or the Nissan LEAF?

The Mercedes-Benz CLA-Class is the more efficient of the two: it reaches 126 mpg combined versus 121 mpg for the Nissan LEAF, a 5 mpg advantage and costs about $50 less per year to fuel.

Which costs less to run per year?

By EPA estimates at 15,000 miles a year, the Mercedes-Benz CLA-Class runs about $600 a year in fuel at its most efficient configuration, versus about $650 for the Nissan LEAF — a difference of roughly $50 per year.

What engines do the CLA-Class and LEAF offer?

Mercedes-Benz CLA-Class: SIDI; Mild Hybrid, SIDI, SIDI; FFV. Nissan LEAF: no engine data on record.

Are they in the same vehicle class?

The EPA classifies the Mercedes-Benz CLA-Class as Compact Cars and the Nissan LEAF as Midsize Cars, so they aren't a like-for-like match on size.

More CLA-Class comparisons

More LEAF comparisons

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