2026 Mercedes-Benz GLS SUV: Unrivaled Luxury and Scale for Glendale

The full-size luxury SUV segment demands a vehicle that provides expansive interior space without compromising refined performance. The 2026 Mercedes-Benz GLS SUV achieves this effortlessly, offering standard three-row seating, benchmark technology, and a profoundly serene cabin. Known as the S-Class of SUVs, this flagship vehicle represents the ultimate in family transportation for drivers in Glendale and the greater Milwaukee area. Available now at Mercedes-Benz Milwaukee North, the latest GLS SUV delivers commanding power and elite comfort for up to seven passengers.

Whether you are navigating the morning school drop-off or embarking on a long-distance road trip across the Midwest, the 2026 GLS SUV handles every journey with absolute grace. This comprehensive model review covers the electrified powertrains, impressive towing capabilities, and premium interior amenities that make this vehicle the definitive choice for Wisconsin families.

A First-Hand Experience: Commanding the Wisconsin Roads

Transporting a large family requires a vehicle that inspires total confidence. Imagine a crisp morning departure from your home in Glendale. The standard AIRMATIC® air suspension system seamlessly adjusts to the weight of your passengers and cargo, ensuring the vehicle remains perfectly level while providing a remarkably smooth ride over uneven pavement. As you merge onto Interstate 43 South, the standard 4MATIC® All-Wheel Drive system actively monitors the road surface, distributing power to the wheels with the best grip to keep you secure during harsh winter weather or sudden spring downpours.

During the warmer months, the GLS SUV acts as the ultimate recreational companion. If your family is heading to Lake Michigan for a weekend retreat, the immense cargo capacity easily swallows luggage, coolers, and sports equipment. The cabin isolates you from the noise of highway traffic, allowing for quiet conversation across all three rows. It is a vehicle that makes every trip around the Greater Milwaukee area feel like a first-class experience.

Performance and Refined Powertrains

Mercedes-Benz engineers have equipped the 2026 GLS SUV lineup with highly advanced powertrains that incorporate electrification to optimize both power and efficiency.

3.0L Inline-6 Turbo: The GLS 450 features a robust inline-6 engine paired with a 48-volt mild hybrid system. It produces 375 horsepower and 369 lb-ft of torque, delivering incredibly smooth acceleration and a 0 to 60 mph time of 5.8 seconds.
4.0L V8 Biturbo: For drivers requiring more robust authority, the GLS 580 upgrades to a twin-turbocharged V8 engine, also featuring a mild hybrid system. This configuration generates a commanding 510 horsepower and 538 lb-ft of torque, pushing the large SUV to 60 mph in just 4.7 seconds.
Handcrafted AMG® 4.0L V8 Biturbo: The performance pinnacle of the lineup is the AMG® GLS 63. This model utilizes a handcrafted engine to unleash an astonishing 603 horsepower and 627 lb-ft of torque, achieving a 0 to 60 mph sprint in a blistering 4.1 seconds, when properly equipped.

Towing Capabilities and Utility

The 2026 Mercedes-Benz GLS SUV is built upon a high-strength architecture designed to support significant hauling requirements. True luxury means having the power to bring your lifestyle with you wherever you go.

When properly equipped, the 2026 GLS SUV provides a maximum towing capacity of up to 7,700 pounds. This impressive rating applies across the core lineup, allowing you to confidently tow a large boat, a pair of jet skis, or a family camper. Advanced features like Trailer Sway Control integrate directly with the electronic stability program of the vehicle, ensuring your cargo remains stable and secure at highway speeds.

2026 GLS SUV Model Breakdown

Choosing the perfect vehicle is simple when you understand the distinct advantages of each configuration. Review below to compare the available models and find the ideal match for your family.

	GLS 450 4MATIC® SUV Powertrain and Output: 3.0L I6 Turbo with mild hybrid (375 HP) (442 HP) Best For: Families prioritizing a balanced blend of efficiency, space, and premium comfort.

GLS 450 4MATIC® SUV

Powertrain and Output: 3.0L I6 Turbo with mild hybrid (375 HP) (442 HP)

Best For: Families prioritizing a balanced blend of efficiency, space, and premium comfort.

	GLS 580 4MATIC® SUV Powertrain and Output: 4.0L V8 Biturbo with mild hybrid (510 HP) (503 HP) Best For: Drivers requiring the classic passing power and towing authority of a V8 engine.

GLS 580 4MATIC® SUV

Powertrain and Output: 4.0L V8 Biturbo with mild hybrid (510 HP) (503 HP)

Best For: Drivers requiring the classic passing power and towing authority of a V8 engine.

	S 580 4MATIC® Sedan Powertrain and Output: Handcrafted 4.0L V8 Biturbo (603 HP) (496 HP) Best For: Enthusiasts seeking aggressive styling and high-performance track-level dynamics.

S 580 4MATIC® Sedan

Powertrain and Output: Handcrafted 4.0L V8 Biturbo (603 HP) (496 HP)

Best For: Enthusiasts seeking aggressive styling and high-performance track-level dynamics.

Exterior Utility and Intelligent Design

The exterior of the 2026 Mercedes-Benz GLS SUV projects strength and sophistication. Its broad stance and flowing lines communicate an aerodynamic efficiency that minimizes wind noise. The prominent front grille is flanked by standard active LED headlamps that intelligently adapt to your speed and the curves of dark Wisconsin roads, providing brilliant forward visibility without blinding oncoming traffic.

Utility is seamlessly integrated into the design. Standard aluminum roof rails allow for the easy installation of cargo boxes or ski racks. A hands-free power liftgate provides effortless access to the rear storage area. Available wheel designs ranging from 21 inches to massive 23-inch AMG® alloys ensure the vehicle maintains a commanding presence whether parked in downtown Milwaukee or driving through the suburbs.

Interior Space and Cabin Comfort

Step inside the 2026 GLS SUV, and you are greeted by an interior that sets the absolute benchmark for full-size luxury. The standard seating configuration accommodates seven passengers, while an optional six-passenger setup replaces the second-row bench with two luxurious captain chairs.

Every surface is crafted from premium materials, including available Nappa leather and natural wood accents. Front passengers enjoy power-adjustable, heated, and ventilated seats with available massage functions. A standard panorama roof bathes the cabin in natural light, enhancing the spacious feel of the interior. When you need to prioritize cargo over passengers, the second and third rows fold completely flat to reveal a massive 84.7 cubic feet of maximum cargo capacity, when properly equipped. Standard 64-color ambient lighting allows you to customize the atmosphere of the cabin to match your exact mood.

Technology and Active Safety

The 2026 GLS SUV features the intuitive Mercedes-Benz User Experience software, acting as a highly advanced digital assistant. The dashboard is dominated by dual 12.3-inch widescreen displays that provide crisp, high-resolution graphics. The system learns your preferences over time and responds to natural conversational voice commands. Standard wireless Apple CarPlay® and Android Auto® ensure your smartphone connectivity remains seamless and clutter-free.

Protecting your family is the ultimate priority. The GLS SUV is equipped with a comprehensive suite of advanced driver assistance systems. Features like Blind Spot Assist, Active Lane Keeping Assist, and Active Brake Assist provide constant vigilance on the road. The proprietary PRESAFE® system acts proactively to mitigate injury if an unavoidable collision is detected. For highway driving, available Active Distance Assist DISTRONIC® maintains a safe following distance in heavy traffic, making long road trips across the Midwest significantly more relaxing.

Why Buy at Mercedes-Benz Milwaukee North

Upgrading your family vehicle requires a dealership that understands the nuances of the luxury market. Mercedes-Benz Milwaukee North in Glendale is the premier destination for discerning drivers throughout the region. Our expert staff intimately understands the specifications of the entire 2026 GLS lineup. We are fully prepared to help you compare the spaciousness of the third row, select the perfect exterior color, and configure the ideal seating arrangement. With a vast inventory, a world-class service center, and a dedicated finance team, we ensure your ownership experience is nothing short of exceptional.

Frequently Asked Questions

Does the 2026 Mercedes-Benz GLS SUV have a third row?

Yes. The 2026 GLS SUV comes standard with three rows of seating. Buyers can choose the standard seven-passenger configuration featuring a second-row bench seat, or opt for a six-passenger layout that replaces the bench with two premium captain chairs for easier third-row access.

What is the towing capacity of the 2026 Mercedes-Benz GLS 450?

When properly equipped, the 2026 Mercedes-Benz GLS 450 4MATIC® SUV can tow up to 7,700 pounds. This exceptional capacity is shared with the V8-powered GLS 580 model, making both options highly capable for hauling recreational trailers.

Is the Mercedes-Benz GLS larger than the GLE?

Yes. The GLS is the largest SUV in the Mercedes-Benz lineup. While the midsize GLE offers an optional third row, the full-size GLS provides significantly more legroom for third-row passengers and a larger total maximum cargo volume.

Take the Next Step

The 2026 Mercedes-Benz GLS SUV represents the peak of luxury, scale, and capability. We invite you to experience this extraordinary vehicle for yourself.

Browse our New Inventory to view the exclusive GLS models currently in stock. Discuss your purchasing and leasing options with our dedicated Finance department. Maintain the performance of your current vehicle by scheduling an appointment with our Service center. Contact Mercedes-Benz Milwaukee North today to schedule your private test drive in Glendale.