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2021 Mercedes-Benz GLS450 review

Research, photos, specs, and expertise

Mercedes-Benz GLS450 highlights

Customer rating

RepairPal reliability rating

Mileage (EPA estimate)

20 city, 24 highway, 21 combined

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All Mercedes-Benz GLS450 years

What is new for the 2021 Mercedes-Benz GLS450?

  • GLS450 trims have been upgraded with A/C Seat(s) and 20 Inch Plus Wheels as standard equipment this year.
  • Run Flat Tires features are now available as options on select trims.

2021 Mercedes-Benz GLS450 trims

Curious how Mercedes-Benz GLS450 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

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Ratings & reliability

Customer ratings

3 out of 5

2 customer reviews

RepairPal reliability rating

3
1
2
Above Average

RepairPal gave the Mercedes-Benz GLS450 an overall reliability rating of 3.5 out of 5 stars, which RepairPal describes as Above Average. This rating ranks Mercedes-Benz GLS450 5th out of 20 among Luxury Fullsize SUVs.

View RepairPal's full rating of the Mercedes-Benz GLS450

Mercedes-Benz GLS450 features and specs

Curious how Mercedes-Benz GLS450 trims differ? Use our side-by-side vehicle comparison to see the differences and similarities

4D Sport Utility 4WD/AWD

Standard Features

  • Power Seat(s)
  • Power Locks
  • Power Mirrors
  • Rear View Camera
  • ABS Brakes
  • Front Seat Heaters
  • Memory Seat(s)
  • Power Folding Third Row
  • Third Row Seat
  • Air Conditioning
  • Overhead Airbags
  • A/C Seat(s)
  • Rear Air Conditioning
  • Adjustable Suspension
  • Parking Sensors
  • Cruise Control
  • Remote Start
  • Leatherette Seats
  • Blind Spot Monitor
  • Sunroof(s)
  • Automated Parking
  • Rear Defroster
  • Side Airbags
  • Power Windows
  • Smart Key
  • Traction Control
  • Power Hatch/Deck Lid
  • 20 Inch Plus Wheels
  • Alloy Wheels
  • Automatic Transmission
  • Turbo Charged Engine
  • 4WD/AWD
  • AM/FM Stereo
  • Apple CarPlay
  • Android Auto
  • Satellite Radio Ready
  • Auxiliary Audio Input
  • Burmester Audio
  • Navigation System
  • Bluetooth Technology

Optional Features

  • Rear Sunshade
  • Seat Massagers
  • Head Up Display
  • Heated Steering Wheel
  • Lane Departure Warning
  • Automated Cruise Control
  • Quad Seats
  • Leather Seats
  • Panoramic Sunroof
  • Rear Seat Heaters
  • Full Roof Rack
  • Run Flat Tires
  • Tow Hitch
  • Running Boards

Drive Wheels

All Wheel (4WD/AWD)

Engine size

3.0L

Horsepower

362

Torque (ft-lbs)

369

Engine type

Turbo Gas

Fuel capacity

23.8

Wheelbase

123.4"

Overall length

205"

Width

77"

Height

71.8"

Leg room

F 40.3"/M 41.9"/R 34.6"

Head room

F 39.4"/M 40.2"/R 38.9"

Front tires

P275/50HR20

Rear tires

P275/50HR20

Seating capacity

7

Transmission

Automatic

2021 Mercedes-Benz GLS450 FAQ

The 2021 Mercedes-Benz GLS450 has received an average 3.0 out of 5 stars from our customers. If you're in the market for a 2021 Mercedes-Benz GLS450, check out reviews from customers just like you. 2021 Mercedes-Benz GLS450 Reviews.
The Mercedes-Benz GLS450 received a rating of 3.5 out of 5 stars from RepairPal, which RepairPal describes as Above Average. This rating ranks the Mercedes-Benz GLS450 as 5 out of 20 among Luxury Fullsize SUV
Here are the pros and cons of the 2021 Mercedes-Benz GLS450: Pros - Interior Space - Technology and Entertainment - Ride and Handling Cons - Reliability - Technology and Entertainment - Dashboard
Here is what's new for the 2021 Mercedes-Benz GLS450:
  • A/C Seat(s)
  • 20 Inch Plus Wheels
  • Run Flat Tires
The 2021 Mercedes-Benz GLS450 offers the following fuel efficiency options: • Gas: 20 city / 24 highway MPG Actual mileage may vary based on driving conditions, vehicle condition, and driving habits.

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* Price excludes tax, title, tags and $499 CarMax processing fee (not required by law). Price assumes that final purchase will be made in the State of AZ, unless vehicle is non-transferable. Vehicle subject to prior sale. Applicable transfer fees are due in advance of vehicle delivery and are separate from sales transactions. Limited warranty is 30 days. See store for details. We make every effort to provide accurate information, but please verify before purchasing.

We hope you found this information helpful. This content is intended to inform and is not meant to indicate that a particular vehicle is currently available or recommended for you.​

Statements of fuel economy or EV range are based on EPA and other third-party estimates for vehicles when new. Fuel economy and EV range will degrade with time and vary based on age, driving conditions, vehicle history, and other conditions. See fueleconomy.gov for more info.

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We make every effort to provide accurate information, but please verify before purchasing.