New & Used 2026 Mercedes-Benz GLS for Sale nearDekalb, IL

Is the 2026 Mercedes-Benz GLS a good car?

The 2026 Mercedes-Benz GLS earns an 7.83/10 expert rating, and the model scores 9/10 across Look and feel and Technology. It is aimed at you if you want a three-row luxury SUV with a three-pointed star on the grille, and the data points to a package that emphasizes passenger room, cargo space, comfort, refinement, and rewarding driving dynamics. The main trade-offs are unimpressive fuel economy and less cargo space than some rivals, along with third-row access that is not especially easy. Even so, the GLS remains a strong fit if you value a polished cabin and an upscale driving experience in a manageable-size luxury SUV. 33.3% of listings are priced as good or great deals, which suggests there are still some worthwhile opportunities in the market.

Is the 2026 Mercedes-Benz GLS reliable?

The 2026 Mercedes-Benz GLS is presented as a refined, comfort-focused luxury SUV with a strong emphasis on premium materials, a composed ride, and solid driving dynamics. Its turbocharged inline-six powertrain is described as the least powerful engine in the lineup, but it still delivers smooth everyday performance, and the standard Airmatic adaptive suspension helps the larger SUV ride and handle well. The cost-effectiveness notes also point to a base GLS 450 4Matic as a sensible choice for buyers who prioritize a quiet cabin, modern technology, and responsive driving behavior. If you plan to keep one long term, the biggest ownership risk is that a complex luxury SUV like this can become expensive to live with if you want to maintain its comfort and technology at a high level.

What should I look for when buying a used 2026 Mercedes-Benz GLS?

Accident-free inventory is excellent at 96.9% — clean inventory, standard diligence applies.

You should still run a vehicle history report and prioritize a pre-purchase inspection, especially on a luxury SUV with a lot of standard technology and driver-assistance hardware. Pay close attention to cabin condition, electronic features, and how smoothly the powertrain and suspension behave in everyday driving. If you are shopping a used GLS, it is worth confirming that the equipment on the specific vehicle matches the trim and option content you expect.

Key things to evaluate:

• Trim level: The GLS 450 is the base version, and the Manufaktur Edition Package adds 21-inch AMG wheels, the AMG Line Exterior Package, the Night Package, and the Exclusive Package with massaging front and heated second-row captain’s chairs. It also brings exclusive paint colors, premium leather upholstery, Natural Grain Grey Oak interior wood trim, and a black headliner.
• Powertrain: The GLS 450 uses a turbocharged 3.0-liter inline-six with mild-hybrid assist, making 375 horsepower and 369 pound-feet of torque. It pairs with a nine-speed automatic transmission and standard 4Matic all-wheel drive, and the setup is tuned for smooth, refined everyday use.
• Safety package: Nearly 40 safety and driver-assistance systems are standard, including Pre-Safe, Crosswind Assist, Active Emergency Stop Assist, front and rear parking sensors, a surround-view camera system, and Car-to-X Communication. Rear-seat side-impact airbags are optional, and hands-free highway driving tech is not offered.
• Infotainment: The GLS uses dual 12.3-inch displays, and wireless Apple CarPlay and Android Auto are standard. A navigation system with augmented reality enhancement is standard, and the system supports online music access through Mercedes-Benz Digital Extras, with a complimentary one-year subscription included.
• Fuel efficiency: The GLS 450 is EPA-rated at 21 mpg combined, and the test route returned 19.4 mpg.

Which 2026 Mercedes-Benz GLS trim should I buy?

The 2026 Mercedes-Benz GLS is offered in 4 trim levels: GLS 450, GLS 580, AMG GLS 63, and Maybach GLS 600.

Here's the short version:

• GLS 450: This is the best-value choice if you want the core GLS experience without chasing the highest price. It already gives you the premium cabin, standard Airmatic adaptive suspension, standard 4Matic all-wheel drive, dual 12.3-inch displays, wireless smartphone integration, and the full suite of standard safety and driver-assistance systems.
• GLS 580: Choose this if you want more power and are willing to pay for it. The data identifies it as a more powerful version of the GLS, so it suits you if the base inline-six is not enough and you want a stronger luxury-SUV feel.
• AMG GLS 63: This is the performance-oriented choice in the lineup. If you want the most aggressive character and are shopping for the sportiest GLS, this is the trim to focus on.
• Maybach GLS 600: Pick this if your priority is maximum opulence. It is the most luxurious expression of the GLS lineup and suits you if you want the richest materials and the most exclusive presentation.

Rear-seat side-impact airbags are optional rather than standard, so that is worth checking on any specific vehicle you consider.

Is now a good time to buy a used 2026 Mercedes-Benz GLS?

This is a moderate market for selective buyers, so you can shop patiently but still move quickly when you find the right example.

• Deal availability: 33.3% of listings are priced as good or great deals.
• Inventory: There are 946 listings available.
• Clean inventory: 96.9% of listings are accident-free.

If you find a listing below $90,376.80, that's toward the low end of the year-round range and worth acting on quickly.

Is the 2026 Mercedes-Benz GLS safe?

The 2026 Mercedes-Benz GLS earns a 7/10 safety score from our experts.

Nearly 40 safety and driver-assistance systems appear on the standard equipment list, including Mercedes’ Pre-Safe, Crosswind Assist, Active Emergency Stop Assist, front and rear parking sensors, a surround-view camera system, and Car-to-X Communication. The GLS also uses a hands-on driver-assistance system with a touch-sensing steering wheel, but it does not offer hands-free highway driving technology. Rear-seat side-impact airbags are optional rather than standard, so that is a trim-level safety gap worth checking before you buy. The system is intended to keep you engaged, and it works best when you remain active and attentive behind the wheel.

Should I buy a 2026 Mercedes-Benz GLS or consider a different year?

If you're weighing the 2026 against nearby model years, here's how to think about it:

Choose the 2026 if:

• 33.3% of listings are priced as good or great deals.
• Accident-free inventory is excellent at 96.9% — clean inventory, standard diligence applies.
• It adds the new-for-2026 Manufaktur Edition Package, which brings exclusive styling and comfort upgrades to the GLS 450.

The bottom line: If you want the current-year GLS with its updated special-edition content and strong mix of comfort, refinement, and technology, the 2026 is the one to target. If you are more price-sensitive, a nearby model year may deliver a similar overall GLS experience for less money, so it is worth comparing listings carefully before you commit.

These recommendations are based on CarGurus' proprietary market data from September 4, 2026, CarGurus experts' opinions, and generative AI.