Mercedes-Benz GLA or GLB: which compact SUV fits Austin drivers?

Choose the GLB if you regularly carry more passengers or gear than the GLA holds. Choose the GLA if you mostly drive solo or as a pair and want the smaller footprint. Both are sold new at our South Austin store on the south I-35 frontage road.

Keep reading below, then schedule a test drive in Austin. Bringing your own numbers to the lot settles this faster than any spec sheet.

Who should buy the GLB and who should buy the GLA in Austin?

Buy the GLB if people or gear fill your car most days. It holds more cargo, seats five as standard and offers seven seats as an option. The GLA suits a driver who mostly goes alone or with one passenger and wants the smaller vehicle in a tight lot.

The rest of this decision comes down to three questions. How many people ride with you most days? How much gear do you haul? Do you need all-wheel drive? If the answer to the first two is more than a small load, the GLB fits. If you mostly drive solo or as a pair, the GLA gives you the smaller footprint without giving up the Mercedes-Benz badge or the same engine family.

How much cargo space and seating do the GLA and GLB have?

The GLB holds more cargo. Its maximum cargo room is 62.0 cubic feet, against 50.5 cubic feet for the GLA 250, according to Mercedes-Benz’s 2026 specifications. The GLB seats five as standard and seven as an option.

Front-row room is almost the same in both. The GLB gives 41.1 inches of legroom in row one and the GLA gives 41.0. The GLB adds a third row with 29.1 inches of legroom, which matters only if you carry people back there often.

If you pack for trips, the cargo number is the one to test. Load a bag set or a stroller into the back before you decide, so you know the space works for your week.

How do GLA and GLB sizes affect parking in Austin?

The GLA is the easier of the two to park. It measures 173.6 inches long and 63.5 inches tall. The GLB 250 measures 182.4 inches long and 66.7 inches tall, according to Mercedes-Benz’s 2026 specifications. Both are 72.2 inches wide, so the difference is front to back, not side to side.

The GLA’s wheelbase is 107.4 inches, against 111.4 inches for the GLB. A shorter vehicle fits better in a tight garage space or a downtown lot where length is the limit. If parking is your tightest constraint, the GLA is the model to test first.

What engine and drive does each Mercedes-Benz GLA and GLB have?

The GLA 250 and GLB 250 share a 2.0-liter, four-cylinder hybrid engine rated at 221 hp and 258 lb-ft of torque. Both come with front-wheel drive or 4MATIC® all-wheel drive. The AMG® GLA 35 and AMG® GLB 35 step up to 302 hp and 295 lb-ft, and both carry all-wheel drive.

The EPA combined rating shows the fuel-economy difference. The GLA 250 with front-wheel drive is rated 29 mpg combined, and the GLA 250 4MATIC® is rated 28. The GLB 250 with front-wheel drive is rated 28, and the GLB 250 4MATIC® is rated 27 (EPA, 2026). EPA’s combined figure is a weighted average, with city driving counted at 55% and highway at 45% (EPA, 2026).

If you need all-wheel drive, both models offer 4MATIC®. Compare the combined ratings with your own mix of city and highway miles.

What does a new GLA cost compared with a new GLB?

Starting MSRP for the GLA 250 is $41,500, and the GLA 250 4MATIC® starts at $43,500, according to Mercedes-Benz’s published starting prices. The GLB 250 starts at $43,800, and the GLB 250 4MATIC® starts at $45,800.

The performance trims cost more. The AMG® GLA 35 starts at $58,550 and the AMG® GLB 35 at $60,600. For most buyers the budget sets the first limit, so check the 250 trims before you look at the AMG® models.

Which GLA or GLB figures should decide your Austin purchase?

These four configurations cover the choice between the two models. Each row gives the manufacturer’s starting MSRP, the maximum cargo room and the EPA combined rating.

The GLB costs more and holds more. Read the cargo column first if you haul gear, and the price column first if the budget sets the limit.

When is the GLA the wrong pick, and when is the GLB?

The GLA is the wrong pick when your gear fills the back seat area. Its 50.5 cubic feet of maximum cargo room trails the GLB’s 62.0. The GLB is the wrong pick when your budget ends near $41,500, the starting MSRP of the GLA 250. The GLB 250 starts at $43,800.

On fuel economy, the GLA 250 is rated 29 mpg combined and the GLB 250 is rated 28 (EPA, 2026). Pick by the constraint that binds first: load, parking or budget.

FAQ

What warranty comes with a new GLA or GLB?

According to Mercedes-Benz’s 2026 warranty booklet, both the GLA and the GLB carry a basic warranty of 4 years/50,000 miles. Put that term next to each model’s price when you compare them.

Can I apply for GLA or GLB financing online at Mercedes-Benz of South Austin?

Yes. We offer a secure finance application online. You can start it from our site before you visit.

Where can I see current lease and finance specials on the GLA and GLB?

We offer both financing specials and leasing specials. Ask us which ones apply to the GLA or GLB you are considering.

What Texas sales tax applies when I buy a new GLA or GLB?

The Texas motor vehicle sales tax is 6.25% of the sales price, minus any trade-in allowance (Texas Comptroller of Public Accounts, 2026). Motor vehicle use tax is also 6.25% of the sales price, less a credit for sales or use taxes paid to other states. A new resident pays a $90 new resident tax in place of use tax on a vehicle brought into Texas.

How far is Mercedes-Benz of South Austin from Buda, Kyle and Dripping Springs?

Buda is about 5.6 miles from the store, Kyle about 11.6 miles and Dripping Springs about 18.1 miles. The store sits on the south I-35 frontage road in Austin, at 10900 S I-35 Frontage Rd, TX 78748. Sales hours are Monday to Friday 8:30 AM to 7:00 PM and Saturday 8:30 AM to 6:00 PM. Sales is closed Sunday.

What do buyers say about the sales process at Mercedes-Benz of South Austin?

In a September 2025 5-star Google review, Merrell G. wrote: “Had the absolute best buying experience with this team. The Sales Manager Jaden, was so patient, kind and invested in helping me make the best decision for my car needs. I didn’t feel pressured at all, he answered all my questions & overall was so personable. Edgar Peyro, the brand ambassador, finished up all the loose ends, and even brought me a gift bag for purchasing with them, and made sure to help me snap any photos I wanted with the car. Chris Diaz was the feature genius when it came to setting up all my stuff technology wise, and went over the car with me in as much detail as I needed. The cherry on top was Vy in finance. Usually that’s the part that takes the longest, but we were only held up by the great conversation we had. She walked me through all things paperwork and had me on my way. I truly could not have asked for a better experience. Thank you Mercedes of South Austin!”

How many passengers and how much cargo should I plan for when choosing a compact SUV?

Start with how many passengers and pets ride regularly, what kind of cargo you haul, and whether you need front-wheel drive or 4MATIC® all-wheel drive. Both models share similar 2.0-liter engine foundations, with around 221 hp in the 250 trims, and both offer 4MATIC®. The GLB handles gear and family cargo with less of a squeeze.

Test drive the GLA and GLB at Mercedes-Benz of South Austin

Our Google record as of October 2026 is 4.6 stars across 830 reviews, and 89 in 100 of them are five-star (Google, 2026). We are part of Group 1 Automotive, and new GLA and GLB models are sold at our South Austin showroom on the I-35 frontage road.

In a May 2025 5-star Google review, Heather wrote: “My son bought his first car and our whole experience was 5* From the moment we walked in and Justin Mayes greeted us. He was so helpful, honest, professional and has a heart for helping others.He went above and beyond for my son by detailing the car himself because the detailing people had already left and sat with him setting up bluetooth and other settings before we drove away. Charles the manager had a wonderful personality and very nice guy. Emma was so personable, professional and definitely knew what she was doing. I can’t say enough good things about our experience. I highly recommend”

In a July 2026 5-star Google review, Tracy R. wrote: “I was truly happy with service personal, Justin Frazier. He was friendly and professional. Service department was done in a timely manner. #Mercedesfaimly”

We offer a secure online finance application, and both financing specials and leasing specials.

Start by visiting us at 10900 S I-35 Frontage Rd with the two models on your list. Bring your load and your budget, and compare the GLA and GLB side by side.

Mercedes-Benz of South Austin answers this question against the specific vehicle in front of you rather than the model in general. Value your trade and get pre-approved online, then see us at our Austin showroom, or call 512-646-6699.

Disclaimer: Vehicle features, specifications, pricing, options, and availability may vary based on production timelines and dealership inventory; images are for illustrative purposes only. Starting MSRP figures are national and exclude destination freight charges, tax, title, license, and dealer fees. Standard and available equipment varies by trim, configuration, and model year; confirm the specification of the individual vehicle before purchase. Maximum towing and payload ratings depend on cab, bed, drivetrain, and equipment configuration; see the vehicle’s Owner’s Manual and trailering guide for limits. Electric range and charging times vary with battery, configuration, temperature, terrain, load, and driving habits. Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Financing and pre-approval are subject to credit approval. Contact Mercedes-Benz of South Austin for complete details regarding current vehicle inventory, pricing, and equipment.