Mercedes-Benz GLS 450 vs. the Mercedes-Benz GLS 550

Mercedes-Benz GLS 450 vs GLS 550
 2018 Mercedes-Benz GLS 450 4MATIC
2018 Mercedes-Benz GLS 550 4MATIC
Starting MSRP ($)
Fuel Economy (city/hwy)
19 / 22 MPG
14 / 18 MPG
Engine/Horsepower/TorqueV6 / 362hp / 369 lb. ft.
V8 / 449hp / 516 lb. ft.
Seating Capacity
7 Passengers
7 Passengers

Two Dynamic SUVs Side-By-Side

With so many amazing models to choose from, sometimes it can be hard to know which Mercedes-Benz is the right pick for you. Here at Mercedes-Benz of Huntington, we want to make your entire car-buying process as easy as possible. That's why we've taken two of our favorite SUVs and put them in this head-to head comparison.

The Mercedes-Benz GLS models are stunning and the best SUVs on the market. Available with a variety of engines and tech features, you really can't go wrong with any of them. But, if you're torn between the various trim levels of this class of SUVs, let us help. Here, we compare the mid-range trim Mercedes-Benz GLS 450 and the upper trim, the Mercedes-Benz GLS 550.

Both the Mercedes-Benz GLS 450 and the Mercedes-Benz GLS 550 are world-class, luxurious SUVs that offer three rows of seating and powerful engines paired with all-wheel drive and an automatic transmission. But, they veer off in different directions when it comes to engines and amenities.

The Mercedes-Benz GLS 450 vs. the Mercedes-Benz GLS 550

Mercedes-Benz GLS 450 SUV

Mercedes-Benz GLS Folding Rear Seats

Mercedes-Benz GLS 450 SUV Road


The Mercedes-Benz GLS 450 comes standard with a 3.0-liter turbocharged V6 engine with 362 horsepower and 369 pound-feet of torque. The Mercedes-Benz GLS 550, meanwhile, comes equipped with a more-powerful 4.6-liter V8 that offers drivers 449 horsepower and 516 pound-feet of torque.


Both the Mercedes-Benz GLS 450 and the Mercedes-Benz GLS 550 are similarly equipped. Both come standard with the kind of high tech amenities and creature comforts drivers expect from Mercedes-Benz, including power-folding and automatically-dimming side mirrors, power liftgate, heated seats, and automatic windshield wipers. However, the Mercedes-Benz GLS 550, being the upper trim level of the model, comes with a few different stylistic details, including an upgraded interior with wood accents on the steering wheel.

Fuel economy

With the smaller engine comes a slightly better fuel economy, of course. The V6 Mercedes-Benz GLS 450 averages around 17 mpg on city streets and 22 mpg on the highway, while the V8 Mercedes-Benz GLS 550 earns around 14 mpg in the city and 18 mpg on the highway.

Mercedes-Benz GLS 550 SUV

Mercedes-Benz GLS SUV Tech

Mercedes-Benz GLS 550 SUV Road

Click here to browse our current selection of Mercedes-Benz GLS SUVs!

Test Drive the Mercedes-Benz GLS on Long Island

To really appreciate the differences between these two versions of the Mercedes-Benz GLS, you should take them both out for a spin around Huntington. We have a nice selection of the entire line of Mercedes-Benz SUVs and look forward to showing you all of their similarities and differences, helping you to choose which model is perfect for you and your family.