Mercedes-Benz GL-Class Fuel Economy (MPG)

Name: Mercedes-Benz GL-Class MPG & Fuel Economy
Creator: AutoSpecData
License: https://creativecommons.org/licenses/by/4.0/

What is the real-world gas mileage of a 2016 Mercedes-Benz GL-Class?

The 2016 Mercedes-Benz GL-Class gets up to 19 MPG combined (17 city / 21 highway) in EPA testing.

Latest model year (2016):

The Mercedes-Benz GL-Class gets up to 19 MPG combined (17 city / 21 highway) in the Auto 7-spd, 6 cyl, 3.0 L trim.

Verifiedfueleconomy.gov · Verified August 11, 2026

Overview MPG Engine Specs Fuel Cost Transmission Drivetrain Vehicle Class Maintenance Dimensions Curb Weight

Mercedes-Benz GL-Class MPG — All Years

Year	Trim	Engine	Fuel	City (MPG)	Hwy (MPG)	Combined (MPG)
2016Config 1 of 3	Auto 7-spd, 6 cyl, 3.0 L	6 3.0L	Premium Gasoline	17	21	19
2016Config 2 of 3	Auto 7-spd, 8 cyl, 4.7 L	8 4.7L	Premium Gasoline	13	18	15
2016Config 3 of 3	Auto 7-spd, 8 cyl, 5.5 L	8 5.5L	Premium Gasoline	13	17	14
2015Config 1 of 3	Auto 7-spd, 6 cyl, 3.0 L	6 3.0L	Premium Gasoline	17	21	19
2015Config 2 of 3	Auto 7-spd, 8 cyl, 4.7 L	8 4.7L	Premium Gasoline	13	18	15
2015Config 3 of 3	Auto 7-spd, 8 cyl, 5.5 L	8 5.5L	Premium Gasoline	13	17	14

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 GL-Class data analysis

How Mercedes-Benz GL-Class combined fuel economy varies

Across 6 configurations recorded for the 2015 through 2016 Mercedes-Benz GL-Class, combined fuel economy runs from 14 MPG to 19 MPG. The strongest figure belongs to the 2015 Mercedes-Benz GL-Class (Auto 7-spd, 6 cyl, 3.0 L) at 19 MPG, and the weakest to the 2016 car (Auto 7-spd, 8 cyl, 5.5 L) at 14 MPG — a spread of 36%. 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 GL-Class would be misleading.

What changed for 2016

Average combined fuel economy for the 2016 Mercedes-Benz GL-Class is 16 MPG, against 16 MPG for the 2015 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 GL-Class data

This page lists every 2015 through 2016 Mercedes-Benz GL-Class record we hold for this measurement — 6 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.

Where these Mercedes-Benz GL-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 GL-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.

Official Factory Specs vs. AutoSpecData Expert Benchmarks

The EPA highway loop never holds interstate speed. Here is what the same engine does when you sit on the cruise control.

Cruise speed	EPA highway spec	AutoSpecData adjusted MPG	Fuel you lose
60 mph	21 MPG	21 MPG	0%
65 mph	21 MPG	19.2 MPG	9%
70 mph	21 MPG	17.5 MPG	17%
75 mph	21 MPG	16 MPG	24%
80 mph	21 MPG	14.7 MPG	30%

Our Real-World Speed MPG Adjuster re-scales the Mercedes-Benz GL-Class EPA highway result with a quadratic drag term (mpg = hwy ÷ (1 + k·(v² − 60²)/60²), k = 0.55 for trucks, SUVs and vans, 0.42 for cars). Wind, roof racks, and a heavy right foot make it worse, never better.

Frequently Asked Questions About GL-Class MPG

What is the MPG of the Mercedes-Benz GL-Class?

The Mercedes-Benz GL-Class gets up to 19 MPG combined (17 city / 21 highway) in the 2016 model year. Fuel economy varies by engine and trim — see the full table above for details.

Which Mercedes-Benz GL-Class trim has the best fuel economy?

The Auto 7-spd, 6 cyl, 3.0 L trim offers the best combined fuel economy at 19 MPG. Smaller engines and front-wheel-drive configurations typically achieve the highest MPG.