2021 Mercedes-Benz GLS

$25,499

from

103

listings

$25K–$60K

price range

Download Infographic

Low$25,499

High$60,000

From$25,499

Avg Mileage61,408 mi

Fresh

Sourced from 103 dealer listings in the latest market snapshot as of May 2026

2021 Mercedes-Benz GLS Pricing

Price Trend

2 data pointsAs of Mar 26

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Mercedes-Benz GLS Fuel Economy

16–21mpg combined

15-20city

19-24hwy

$3,900-$5,100/yr

Fuel economy for the 2021 Mercedes-Benz GLS ranges from 16 to 21 MPG combined across 3 setups. The table below breaks it down by trim so you know exactly what you're signing up for.

By Trim

GLS450 4matic - Automatic 9-spd

21mpg

3.0L 6-cyl Turbo · 4-Wheel Drive

20 city24 hwy~$3,900/yr4/10 Average

GLS580 4matic - Automatic 9-spd

18mpg

4.0L 8-cyl Turbo · 4-Wheel Drive

16 city21 hwy~$4,550/yr3/10 Poor

GLS600 4matic Maybach - Automatic 9-spd

16mpg

4.0L 8-cyl Turbo · 4-Wheel Drive

15 city19 hwy~$5,100/yr2/10 Poor

Source: U.S. Environmental Protection Agency (EPA)

Where to Find 2021 Mercedes-Benz GLS

35States

32%in top 3

The biggest cluster of inventory is in California (15%), but the remaining listings are spread across 34 other states nationwide.

CACalifornia

61115%

FLFlorida

3629%

TXTexas

3378%

ILIllinois

2717%

NJNew Jersey

2516%

NYNew York

2205%

GAGeorgia

2165%

PAPennsylvania

1674%

DCWashington DC

1524%

AZArizona

1343%

MDMaryland

1193%

NCNorth Carolina

1123%

TNTennessee

1012%

OHOhio

822%

MI73

MA71

MO70

DE68

WA66

CO57

MT54

WI48

NH42

OR36

OK35

UT30

IN30

RI28

MN27

NV26

KS25

VA24

MS23

AL21

WV21

Geographic distribution reflects all active listings for this model, not just 2021.

Buying a 2021 Mercedes-Benz GLS?

Answers to common buyer questions

Is the 2021 Mercedes-Benz GLS a good car to buy?

The 2021 Mercedes-Benz GLS has its strengths and its watch-outs. Check the safety section for recall details and the pricing data to see if the numbers work for you.

What's the gas mileage of the 2021 Mercedes-Benz GLS?

You'll get between 16 and 21 MPG combined from the 2021 Mercedes-Benz GLS, depending on engine and drivetrain. That's a meaningful difference over time. The fuel economy table shows exactly which configs get what.