Mercedes-Benz S-Class or GLS: which fits Austin drivers?
Choose the GLS if you regularly carry passengers and cargo and want an SUV’s higher seating position. Choose the S-Class if you mostly drive alone or with one or two passengers and want a luxury sedan. Mercedes-Benz of South Austin sells both new.
Seating, cargo, price, size, power and warranty decide most of the choice. Each one is below, using Mercedes-Benz’s published figures for Austin drivers.
Keep reading below, then schedule a test drive in Austin. Bringing your own numbers to the lot settles this faster than any spec sheet.
Austin drivers who need space pick the GLS; sedan drivers pick the S-Class
Choose the S-Class if you drive alone or with one or two passengers and want a sedan. Mercedes-Benz’s published figures show why: the GLS 450 seats 7, with 6 optional, while the S 500 sedan’s maximum cargo is 12.5 cubic feet.
Austin drivers who ferry kids, friends or gear will feel that gap every week. A sedan suits a commute with one or two people in the car. We sell both models new at Mercedes-Benz of South Austin, so you can compare them side by side.
How many passengers and how much cargo do the S-Class and GLS hold?
The GLS seats more people and carries more cargo than the S-Class. According to Mercedes-Benz’s published 2026 specifications, the GLS 450 4MATIC® SUV seats 7, with 6 optional, and the Mercedes-Maybach S 580 4MATIC® seats 5, with 4 optional.
The GLS 450 also has a third row, with 34.6 inches of legroom. Its maximum cargo is 84.7 cubic feet, against 12.5 cubic feet for the S 500 4MATIC® Sedan. Rear legroom in the second row favors the sedan, at 43.9 inches against 41.9 inches in the GLS 450.
Consumer Reports sets 46 cubic feet of usable cargo room as the minimum for a three-row SUV to qualify for its most-cargo-room rankings (Consumer Reports, 2026). Mercedes-Benz’s maximum cargo figure measures something different. Even so, a family with bags to load gets more room from the GLS 450.
What do the Mercedes-Benz S-Class and GLS cost to buy in Austin?
Texas motor vehicle sales tax applies on top of the sticker price. The Texas Comptroller of Public Accounts (2026) sets the rate at 6.25% of the sales price, minus any trade-in allowance.
For 2026, Mercedes-Benz lists the GLS 450 4MATIC® SUV at $90,250, the GLS 580 4MATIC® SUV at $116,150 and the AMG® GLS 63 SUV at $151,050. The S 500 4MATIC® Sedan starts at $112,550, and the S 580 4MATIC® Sedan at $134,600.
Every figure in this example is hypothetical. Say a $20,000 trade-in comes off the $90,250 price of a GLS 450. The tax then applies to $70,250, which comes to $4,390.63 at 6.25%.
Luxury cars also lose value fast. iSeeCars’ 2026 5-Year Depreciation Study found luxury models make up 18 of the 25 fastest-depreciating vehicles. Plan for resale when you set your budget.
How do the S-Class and GLS differ in size and ground clearance?
The GLS 450 is the taller of the two, at 71.8 inches, against 59.2 inches for the S 500 sedan. The S 500 is longer, at 209.5 inches against 205.0 inches for the GLS 450.
The GLS is also wider, at 79.9 inches against 75.6 inches. It weighs 5,523 pounds, against 4,696 pounds for the S 500. The GLS 450 has a 123.4-inch wheelbase, and the S 500 has 126.6 inches.
What engines, drive systems and warranty come with the S-Class and GLS?
Both models carry a basic warranty of 4 years or 50,000 miles, according to Mercedes-Benz’s 2026 warranty booklet.
Power rises with the trim. The GLS 450 makes 375 horsepower and 369 lb-ft of torque. The GLS 580 makes 510 horsepower, and the AMG® GLS 63 makes 603. The S 500 makes 442 horsepower and 413 lb-ft of torque, and the S 580 makes 530 horsepower.
The EPA certifies the GLS 450 4matic as a hybrid at 19 city, 24 highway and 21 combined mpg.
How do the S-Class and GLS compare on price, seats, cargo and EPA rating?
Mercedes-Benz’s published 2026 figures and the EPA’s certification record give these numbers.
| Model | Starting MSRP | Max cargo (cu ft) | EPA combined (mpg) |
|---|---|---|---|
| GLS 450 4MATIC® SUV | $90,250 | 84.7 | 21 |
| GLS 580 4MATIC® SUV | $116,150 | 84.7 | 16 |
| S 500 4MATIC® Sedan | $112,550 | 12.5 | 23 |
| S 580 4MATIC® Sedan | $134,600 | 12.5 | 20 |
The GLS 450 starts $22,300 below the S 500 and carries nearly seven times the cargo. The S 500 returns the better combined EPA rating, at 23 mpg against 21 for the GLS 450.
When is the S-Class or the GLS the wrong pick for an Austin driver?
The S-Class is the wrong pick for a driver who regularly fills the back seat or hauls gear. The S 500 offers 12.5 cubic feet of maximum cargo, against 84.7 for the GLS 450.
The GLS is the wrong pick for a driver who wants a lower profile. At 71.8 inches tall, the GLS 450 stands well above the S 500’s 59.2 inches. If you want an SUV without the GLS’s size, the GLE 450 4MATIC® SUV in our lineup starts at $74,800.
If you plan to tow, the four GLS trims in Mercedes-Benz’s published figures each carry a 7,700-pound maximum towing rating.
Frequently asked questions
How much is the Texas sales tax on a new Mercedes-Benz?
Texas figures the tax on the price after your trade-in allowance comes off, so a trade-in lowers the amount taxed. The tax follows the price of the exact trim you choose. Ask for the tax line on the quote for that trim before you sign.
Can I finance or lease an S-Class or GLS at Mercedes-Benz of South Austin?
Yes. We offer both financing specials and leasing specials. You can start with our secure finance application online, then bring your numbers to our Austin showroom.
Where is Mercedes-Benz of South Austin, and which Austin-area drivers does it serve?
We are at 10900 S I-35 Frontage Rd, Austin, TX 78748, on the south side of Austin. Sales hours are 8:30 AM to 7:00 PM Monday to Friday, and Saturday hours end at 6:00 PM. We are closed Sundays for sales.
Is there an electric alternative to the S-Class and GLS?
Yes. We sell the EQS Sedan and the EQS SUV new. The EQS SUV EQS 400 4MATIC® starts at $89,950 and seats 5, with 7 optional.
Is the GLE a smaller alternative to the GLS?
The GLE 450 4MATIC® SUV seats 5, with 7 optional, and carries 74.9 cubic feet of maximum cargo. The GLE 350 4MATIC® SUV starts at $68,400, and the GLE 450 starts at $74,800.
What are my options for a pre-owned S-Class or GLS in Austin?
A Certified Pre-Owned Mercedes-Benz comes with a certification process, 24-hour Roadside Assistance, and a one-year unlimited-mileage warranty. That warranty can be extended for up to two more years. To qualify, a vehicle must be six model years old or newer, have under 75,000 miles and pass a 165-plus-point inspection (Mercedes-Benz USA, 2026).
See the S-Class and GLS at Mercedes-Benz of South Austin
Choosing between these two comes down to who rides with you. Drive both before you decide, and bring your shortlist to Mercedes-Benz of South Austin at 10900 S I-35 Frontage Rd, Austin, TX 78748. We are open for sales from 8:30 AM to 7:00 PM Monday to Friday, and Saturday hours end at 6:00 PM.
Our Google record, as of November 2026: 4.6 stars across 862 reviews; 89 in 100 of them are five-star.
In a June 2026 5-star Google review, S. S. wrote: “Tim G., my sales person, was great and communicative. Lee the general manager was very helpful and friendly. Carrie in finance provided a smooth pressure free purchasing process. Overall, the staff and the facilities made it a great buying experience.”
In a May 2026 5-star Google review, Brad W. wrote: “Kirby and Carrie were amazing. One of the best car buying experiences of my life (and I’ve had many). No pressure, they listened and made the process simple. Visit Kirby in sales. You’ll love her.”
Start with the secure finance application online, then visit Mercedes-Benz of South Austin with the S-Class and the GLS on your list.
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.
