2026 · Midsize & Large SUV · Hybrid

2026 Mercedes-Benz GLS-Class Hybrid MPG & fuel economy

The 2026 Mercedes-Benz GLS-Class Hybrid is a midsize or large SUV offered in 4 EPA-rated configurations. The most efficient version returns 21 MPG combined (19 city / 24 highway) on premium gasoline. Across the lineup, combined ratings range from 15 to 21 MPG. Efficiency is unchanged from the 2025 model. Among 91 midsize & large SUVs rated for 2026, it ranks 69th for lowest fuel cost. At 15,000 miles a year with $3.95/gal premium gas, it costs about $2,821 a year to fuel.

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Combined 21 MPG 19 MPG city · 24 MPG hwy

Driving range — not published for this model

Your fuel cost $2,821 15,000 mi/yr · $18.81 per 100 mi

Class rank, 2026 #69 of 91 Midsize & Large SUVs by fuel cost

What will it cost you?

Your mileage and prices are saved and used across the site.

Miles per year Premium gas $/gal

Fuel average

The 2026 Mercedes-Benz GLS-Class Hybrid's fuel average is 8.9 km/L (11.2 L/100 km), or 21 MPG combined: 8.1 km/L in the city and 10.2 km/L on the highway.

	MPG	km/L	L/100 km
City	19	8.1	12.4
Highway	24	10.2	9.8
Combined	21	8.9	11.2

How it ranks among 2026 Midsize & Large SUVs

Full class ranking →

1Audi Q4 e-tron115 MPGe $794
2Lucid Gravity111 MPGe $818
3Cadillac Optiq105 MPGe $867
4Tesla Model X105 MPGe $869
5Honda Prologue104 MPGe $878
···
69Mercedes-Benz GLS-Class Hybrid21 MPG $2,821
···
91Rolls-Royce Cullinan14 MPG $4,232

2026 GLS-Class HybridOther midsize & large SUVsClass median: $2,277/yr

Annual fuel cost at 15,000 miles and default prices; shorter bars cost less.

GLS-Class Hybrid MPG across model years

Full history →

4 EPA-rated configurations

Configuration	Type	City	Hwy	Combined	Range	Your cost / yr
AWD · 3.0L 6-cyl turbo · 9-speed automatic GLS450 4matic	Hybrid	19 MPG	24 MPG	21 MPG	—	$2,821
AWD · 4.0L 8-cyl turbo · 9-speed automatic AMG GLS63 4matic Plus	Hybrid	15 MPG	20 MPG	17 MPG	—	$3,485
AWD · 4.0L 8-cyl turbo · 9-speed automatic GLS580 4matic	Hybrid	14 MPG	20 MPG	16 MPG	—	$3,703
AWD · 4.0L 8-cyl turbo · 9-speed automatic GLS600 4matic Maybach	Hybrid	13 MPG	18 MPG	15 MPG	—	$3,950

Specs (most efficient configuration)

Fuel: Premium gasoline
Engine / motor: 3.0L 6-cyl turbo
Transmission: 9-speed automatic
Drivetrain: AWD
Tailpipe CO₂: 428 g/mi
EPA fuel economy score: 4/10
EPA greenhouse gas score: 4/10

2026 Mercedes-Benz GLS-Class Hybrid vs. rivals

vs BMW XM 47 MPGe + 14 MPG · $2,889/yr GLS-Class Hybrid saves $68/yr vs Lincoln Navigator 17 MPG · $2,735/yr Navigator saves $86/yr vs Land Rover Range Rover Hybrid 22 MPG · $2,693/yr Range Rover Hybrid saves $128/yr vs Audi Q7 22 MPG · $2,693/yr Q7 saves $128/yr vs Genesis GV80 22 MPG · $2,693/yr GV80 saves $128/yr vs Land Rover Defender 20 MPG · $2,962/yr GLS-Class Hybrid saves $141/yr vs Land Rover Defender Hybrid 20 MPG · $2,962/yr GLS-Class Hybrid saves $141/yr vs Lexus LX Hybrid 20 MPG · $2,962/yr GLS-Class Hybrid saves $141/yr vs Audi Q7 Hybrid 20 MPG · $2,962/yr GLS-Class Hybrid saves $141/yr

Compare the 2026 GLS-Class Hybrid

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Frequently asked questions

What is the gas mileage of the 2026 Mercedes-Benz GLS-Class Hybrid?

Up to 21 MPG combined (19 city / 24 highway); ratings range from 15 to 21 MPG depending on configuration.

What fuel does the 2026 Mercedes-Benz GLS-Class Hybrid use?

Premium gasoline (premium is required or recommended by the manufacturer).

What is the fuel average in km/L for the 2026 Mercedes-Benz GLS-Class Hybrid?