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The 2026 Mercedes-Benz GLS SUV at Mercedes-Benz of South Mississippi combines three-row versatility with the comfort, technology, and thoughtful details expected from a flagship Mercedes-Benz SUV. It seats up to seven passengers, offers an available six-seat configuration with second-row captain’s chairs, and surrounds all three rows with upscale amenities. For buyers in D’Iberville, MS, comparing luxury SUVs, this interior review covers the GLS SUV’s seating and passenger space, comfort features, climate controls, materials, cargo capacity, MBUX infotainment system, connectivity, and audio options.
Before getting into the details, here are some of the most useful cabin specifications for buyers:
The GLS seats seven with its standard second-row power bench or six with available individual captain’s chairs. The captain’s-chair configuration creates a walk-through between the seats, providing another way to access the third row.
The second-row seats power-adjust and recline to help passengers get comfortable and access the third row. When more cargo room is needed, the third-row seats can power-fold in a 50/50 split.
The GLS uses its full-size dimensions to provide meaningful room across the cabin.
Key measurements include:
For buyers who regularly carry family, friends, or adult passengers, the 41.9 inches of second-row legroom is especially worth noting, while 34.6 inches of third-row legroom gives shoppers a useful measurement when evaluating the rearmost seats.
Comfort is one of the defining elements of the Mercedes-Benz luxury experience, and the GLS spreads many of its amenities throughout the cabin.
Power front seats include:
Depending on equipment, buyers can also add massage functionality, a heated steering wheel, and heated armrests.
Available second-row features extend many of the GLS SUV's comfort amenities beyond the front seats.
That equipment can be particularly useful for families and buyers who spend significant time traveling along the Mississippi Gulf Coast.
The 2026 GLS provides at least four climate zones, allowing occupants in different areas of the cabin to personalize their temperature settings. Five-zone automatic climate control is standard on the GLS 580 and available on the GLS 450.
Available Air Balance equipment adds cabin-air purification and a fragrance system.
For buyers who place a priority on cabin refinement, an available Acoustic Comfort Package focuses on creating a quieter, more relaxing passenger environment.
The GLS cabin combines 64-color ambient lighting, a Panorama roof, and available Nappa leather upholstery to shape its interior atmosphere. Buyers can then personalize individual elements depending on model and configuration.
An LED lighting network highlights cabin contours and illuminates the footwells. Drivers can choose among 64 ambient-lighting colors, including the ability to pair and sequence colors.
A large tinted-glass Panorama roof brings more natural light into all three rows. The front panel can power-tilt-and-slide, while a power mesh screen provides shade when needed.
The roof can even close automatically if the vehicle detects rain.
Depending on the model and configuration, available upholstery choices extend to Black Exclusive Nappa leather or MANUFAKTUR Nappa leather.
These choices allow buyers to personalize the cabin while retaining the clean, modern design associated with Mercedes-Benz luxury.
The GLS 580 offers 17.4 to 84.7 cubic feet of cargo capacity, depending on the seating configuration.
Useful cargo features include power-folding 50/50-split third-row seats and a retractable luggage cover.
The 50/50-split third row lets you fold one side for longer cargo while retaining a rear passenger seat or lower more seating when maximum cargo capacity becomes the priority.
Mercedes-Benz technology in the 2026 GLS centers on twin 12.3-inch displays, MBUX, wireless smartphone integration, navigation, voice controls, and available rear-seat technology. The configurable digital instrument cluster places driving information directly ahead, while the 12.3-inch multimedia touchscreen manages infotainment, navigation, connectivity, and vehicle functions.
The Mercedes-Benz User Experience, or MBUX, includes features such as:
The goal is straightforward: make commonly used functions easy to reach without filling the dashboard with unnecessary controls.
An available Head-Up Display provides another way for the driver to view important information while keeping attention directed toward the road.
Second-row passengers can also access a range of available technology features:
The standard Burmester® Surround Sound System includes 13 speakers, Dolby Atmos, and Sound Personalization. Buyers who put a higher priority on audio can choose a 29-speaker Burmester® High-End 3D Surround Sound System.
If you're comparing Mercedes-Benz SUVs in D'Iberville, specifications only tell part of the story. Seating position, third-row access, display placement, material choices, and cabin comfort are details best evaluated from inside the vehicle.
Visit Mercedes-Benz of South Mississippi in D'Iberville, MS, to explore the 2026 Mercedes-Benz GLS SUV in person. Compare seating configurations and available interior features, experience the MBUX system firsthand, and schedule a test drive to see how the GLS fits your passengers, cargo, and everyday driving needs.
*Disclaimer: This content was drafted with AI assistance for initial drafting, reviewed by a subject-matter expert for accuracy, and edited by our team of writers and editors. Burmester is a registered trademark of Burmester Audiosysteme GmbH, Berlin, Germany