2021 Mercedes-Benz GLS

$14,900

from

listings

$15K–$50K

price range

Download Infographic

Low$14,900

High$50,395

From$14,900

Avg Mileage64,011 mi

Fresh

Sourced from 91 dealer listings in the latest market snapshot as of Jul 2026

2021 Mercedes-Benz GLS Pricing

Price Trend

Building price history...

The price range is enormous.

Some are steals, some are wildly overpriced. A scout cuts through the noise and surfaces the ones worth your time.

Cut through the noiseFrom $5/week

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

33States

33%in top 3

The biggest cluster of inventory is in California (16%), but the remaining listings are spread across 32 other states nationwide.

CACalifornia

70616%

TXTexas

3618%

FLFlorida

3448%

NJNew Jersey

3027%

NYNew York

2706%

ILIllinois

2656%

GAGeorgia

2566%

PAPennsylvania

1664%

DCWashington DC

1363%

AZArizona

1263%

MDMaryland

1042%

NC102

TN92

OH88

MOMissouri

792%

DE77

MA74

MI74

WA68

CO50

WI46

OK43

UT37

NH37

OR35

MN33

IN32

AL31

NV30

RI27

VA25

KS25

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.