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2018 Mercedes-Benz GLS 550

2018 Mercedes-Benz GLS 550

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$50,300 — $74,852 USED
7 Seats
16 MPG
Key specs of the base trim
Compare 1 trims


Is this the car for you?
(4.5) 4 reviews

The Good

  • Third-row space and accessibility
  • Interior quality, amenities

The Bad

  • Leather upholstery not standard
  • V-8 gas mileage
2018 Mercedes-Benz GLS 550 exterior side view

What to Know

about the 2018 Mercedes-Benz GLS 550
  • New Grand Edition
  • Three-row, seven-seat SUV
  • All-wheel drive standard
  • 577-hp AMG GLS63 available

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2018 Mercedes-Benz GLS 550 Review

from the expert editorial team

What it is: The seven-seat GLS-Class SUV has standard all-wheel drive, three rows of seats and three available engines: two turbocharged V-8s and a turbocharged V-6. As with other Mercedes, the top-shelf version of the GLS-Class is a performance-oriented AMG edition, the AMG GLS 63. Competitors include the Audi Q7, Cadillac Escalade, Infiniti QX80 and Lexus LX 570.

New for 2018

Available for the GLS 450 and GLS 550, a new Grand Edition includes diamond-quilted Nappa leather upholstery, a Nappa leather dashboard, open-pore brown ash trim, ambient lighting and brown velour floormats. Exterior Grand Edition cues include special badges and two-tone wheels – 20 inches on the GLS 450 and 21 inches on the GLS 550.

The AMG GLS 63 packs big power into a big SUV: 577 horsepower from a twin-turbocharged 5.5-liter V-8 engine that works with a seven-speed automatic transmission. 

What’s Special

  • All-wheel drive splits 60 percent of the SUV’s power to the rear wheels and 40 percent to the front
  • AMG air suspension
  • AMG sport exhaust system
  • Widened fenders to fit 21-inch wheels

Consumer Reviews

What drivers are saying

4 reviews — Read All reviews
Exterior Styling
Interior Design
Value For The Money

I expect more from a vehicle of this price

by DaninPA on June 10, 2019

the car has many fine features as it should. Areas that need improvement - smart phone integration, the rear seat headrests are awkward and uncomfortable, all of the side window molding becomes ... Read full review



by Jenilynn from Sedalia MO on December 12, 2018

Can’t wait until I have one of my own! It truly is a modern marvel full of thoughtful engineering and intuitive controls for top of the line driving experience. Read full review


Recalls and crash tests


The 2018 Mercedes-Benz GLS 550 currently has 2 recalls

Crash and Rollover Test Ratings

The 2018 Mercedes-Benz GLS 550 has not been tested.


New car and certified pre-owned programs by Mercedes-Benz

New Car Program Benefits

  • Bumper-to-Bumper

    48 months / 50,000 miles

  • Powertrain

    48 months / 50,000 miles

  • Roadside Assistance

    48 months / 50,000 miles

Change Year or Vehicle

All Model Years for the Mercedes-Benz GLS 550

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0 / 0 Car Seat Check

Certified child passenger safety technicians conduct hands-on tests of a car’s Latch system and check the vehicle’s ability to accommodate different types of car seats. The GLS 550 received the following grades on a scale of A-F.*
* This score may not apply to all trims, especially for vehicles with multiple body styles that affect the space and design of the seating.

Warranty FAQs

What is a Bumper-to-Bumper warranty?

Often called a basic warranty or new-vehicle warranty, a bumper-to-bumper policy covers components like air conditioning, audio systems, vehicle sensors, fuel systems and major electrical components. Most policies exclude regular maintenance like fluid top offs and oil changes, but a few brands have separate free-maintenance provisions, and those that do offer them is slowly rising. Bumper-to-bumper warranties typically expire faster than powertrain warranties.

What is a Powertrain warranty?

Don't be misled a 10-year or 100,000-mile powertrain warranty doesn't promise a decade of free repairs for your car. It typically covers just the engine and transmission, along with any other moving parts that lead to the wheels, like the driveshaft and constant velocity joints. Some automakers also bundle seat belts and airbags into their powertrain warranties. With a few exceptions, powertrain warranties don't cover regular maintenance like engine tuneups and tire rotations.

What is included in Roadside Assistance?

Some automakers include roadside assistance with their bumper-to-bumper or powertrain warranties, while others have separate policies. These programs cover anything from flat-tire changes and locksmith services to jump-starts and towing. Few reimburse incidental costs like motel rooms (if you have to wait for repairs).

What other services could be included in a warranty?

Some automakers include free scheduled maintenance for items such as oil changes, air filters and tire rotations. Some include consumables including brake pads and windshield wipers; others do not. They are typically for the first couple of years of ownership of a new car.

What does CPO mean?

A certified pre-owned or CPO car has been inspected to meet minimum quality standards and typically includes some type of warranty. While dealers and third parties certify cars, the gold standard is an automaker-certified vehicle that provides a factory-backed warranty, often extending the original coverage. Vehicles must be in excellent condition and have low miles and wear to be certified, which is why off-lease vehicles feed many CPO programs.

See also the latest CPO incentives by automaker

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