GLA vs GLB: Which Mercedes-Benz SUV is Right for You?

It’s easy to get confused when you’re looking at the Mercedes-Benz GLA and the Mercedes-Benz GLB. They’re both part of the brand’s compact SUV family that deliver a premium experience, but they’re built for different types of drivers. One is a sleek, sporty crossover perfect for zipping around town, and the other is all about space and versatility. We’re here to help you figure out which one is the right fit for your life.

What’s The Main Difference Between the Mercedes-Benz GLB vs GLA?

The Mercedes-Benz GLA and GLB are both excellent compact SUVs, but they are built for different types of drivers. The main difference between the two is their size and interior space. The Mercedes-Benz GLA has a sleeker, more rounded design that gives it a sporty and nimble feel on the road. It offers a fun driving experience and has a slightly better fuel economy, which makes it a great choice for a driver who wants a stylish crossover.

The Mercedes-Benz GLB, on the other hand, is a bit larger and has a boxier shape. This design gives it a huge advantage in terms of space. The Mercedes-Benz GLB offers a unique optional third row that brings its seating capacity to seven people, which is a major benefit for families. It also has significantly more cargo space and extra room for passengers.

While both SUVs share the same turbocharged engine and are available with 4MATIC AWD, the choice between them comes down to whether you prioritize a sporty feel (GLA) or extra space and practicality (GLB).

Engine and Performance Differences

When you compare the GLA vs GLB, the engine is a great place to start. They have very similar powertrains, but their road performance can feel a bit different.

The Shared Turbocharged Engine

Both the GLA and the GLB come standard with a turbocharged 2.0L 4-cylinder engine, which produces 221 horsepower and 258 lb-ft of torque. This is plenty of power for a compact SUV, giving both the GLA 250 and the GLB 250 a responsive and fun driving experience. Both engines are also paired with an 8-speed automatic transmission for smooth shifting.

More Power with AMG® Trims

If you crave a more sporty feel, both Mercedes-Benz SUVs have an available AMG® trim. The GLB comes in the GLB 35, and the GLA comes in the GLA 35. These models feature a more powerful version of the standard turbocharged engine, which delivers 302 horsepower and 295 lb-ft of torque. This serious performance boost makes for an even more exhilarating driving experience.

Fuel Economy

When it comes to fuel economy, both SUVs are very efficient. The EPA estimates for the GLA 250 are slightly higher than those of the GLB 250, with the GLA getting an estimated 34 mpg on the highway compared to the GLB’s 33 mpg. Both vehicles are also available with the 4MATIC® AWD system, which gives you better traction in varying weather conditions. Opting for 4MATIC® can also slightly affect the MPG ratings.

Are the Mercedes-Benz GLA and GLB Different in Size?

Get inside a Mercedes-Benz GLA or a Mercedes-Benz GLB, and you’ll immediately feel the difference. Both are great compact SUVs, but they have different ideas of what a great driving experience should feel like. The Mercedes-Benz GLA is a sleeker, more nimble crossover, while the Mercedes-Benz GLB is designed to give you more room.

The Game-Changing Third Row

The biggest difference between these two is how many people they can carry. The Mercedes-Benz GLB has a longer wheelbase and a boxier design, which gives it the option of a third row of seats. This is a game-changing feature for a compact SUV. With the optional third row, the Mercedes-Benz GLB can seat up to seven people, which is a huge advantage for families. The Mercedes-Benz GLA is only available with two rows, for a total of five passengers.

Extra Room for Cargo

The difference in size also has a big impact on cargo capacity. The Mercedes-Benz GLB has significantly more cargo space than the Mercedes-Benz GLA. With the rear seats folded down, the Mercedes-Benz GLB offers up to 62.0 cubic feet of space, while the Mercedes-Benz GLA has 50.5 cubic feet of space.

This extra room makes the Mercedes-Benz GLB a more practical choice for a family who needs to haul luggage, sports gear, or groceries. The Mercedes-Benz GLB also has more legroom and headroom in the second row of seats, making it a more comfortable ride for passengers on longer trips.

Frequently Asked Questions

Choosing between these two vehicles can be tough, so here are answers to some of the most common questions we hear.

Was the GLB Discontinued?

No, the Mercedes-Benz GLB has not been discontinued. It’s still an active and popular part of the Mercedes-Benz lineup for drivers who need a compact SUV with extra room. It even received an update for the 2024 model year and continues to be a top choice for its unique style and optional third row.

What are the Pros and Cons of the GLA?

The Mercedes-Benz GLA is a fantastic luxury SUV with many great qualities. Its smaller size and lower ride height give it a sporty and nimble driving experience. It also has slightly better fuel economy than the Mercedes-Benz GLB. However, the Mercedes-Benz GLA has less cargo space and interior room than its sibling and only has a seating capacity of five.

Which Car is Better, GLB or GLC?

The choice between a GLB and a GLC comes down to what you need. The GLB is a compact SUV that offers better mpg and a unique optional third row. The GLC is a slightly larger crossover that offers a more powerful standard turbocharged engine and a slightly higher MSRP. The GLB is a great option for a family that needs more space and a third row, while the GLC is a better choice for someone who wants more power and a traditional midsize feel.

Which is Better, BMW X3 or Mercedes-Benz GLB?

Ultimately, the choice comes down to your personal driving style. If you prioritize a sporty and dynamic feel, the X3 might be your choice. If a plush, comfortable ride and a high-tech, elegant interior are what you’re looking for, the GLB is likely the better fit. We recommend you take a test drive in both to see which one feels right for you.

Test Drive Mercedes-Benz SUVs at Mercedes-Benz of San Antonio

Both the GLA and GLB are great examples of luxury and quality. The GLA offers a sleek, sporty feel that is perfect for city driving, while the GLB provides a great amount of extra room and seating capacity with its optional third row.

The best way to decide which one is right for you is to experience them in person. At Mercedes-Benz of San Antonio, our team of experts can walk you through all the available options and help you find the perfect luxury SUV for your lifestyle. We invite you to come visit our dealership and take a test drive to feel the difference for yourself.