Mercedes-Benz of Sudbury
2026 Mercedes-Benz GLS
Now available at Mercedes-Benz of Sudbury in Sudbury, MA
- Starting MSRP$90,250
- Horsepower375–603 hp
- EPA MPG19 city / 24 hwy
- Max Towing7,700 lbs
The 2026 Mercedes-Benz GLS brings three-row SUV flexibility, all-wheel-drive capability, and a broad range of performance to Mercedes-Benz of Sudbury in Sudbury, MA. This page gives shoppers a clear look at the GLS lineup, including pricing, powertrains, efficiency, towing capacity, dimensions, competitor comparisons, and ways to begin the buying process locally. With seating for 6–7 passengers, premium unleaded fuel requirements, and engine choices ranging from inline-six to V8 configurations, the GLS is shaped for families and drivers who want substantial capability without leaving the luxury SUV segment. Explore live new inventory, review ownership resources, and connect with Mercedes-Benz of Sudbury when it is time to compare trims in person.
- Starting MSRP
- $90,250
- Horsepower
- 375–603 hp
- EPA MPG
- 19 city / 24 hwy
- Max Towing
- 7,700 lbs
- Seating
- 6–7 seats
- Drivetrain
- All Wheel Drive
- Fuel
- Premium Unleaded (Required)
- Body Style
- SUV
How the 2026 Mercedes-Benz GLS Compares With Its Competitors
Pricing, power, fuel economy, towing, drivetrain, and fuel requirements help define the luxury three-row SUV class. The 2026 Mercedes-Benz GLS starts at $90,250, with MSRP excluding tax, title, registration and dealer fees.
| Spec | 2026 Mercedes-Benz GLS | 2026 Lincoln Navigator | 2026 Audi SQ7 | 2026 BMW X7 |
|---|---|---|---|---|
| Starting MSRP | $90,250 | $91,995 | $93,800 | $86,700 |
| Horsepower | 375–603 hp | 440 hp | 500 hp | 375–523 hp |
| EPA MPG | 19 city / 24 hwy | 15 city / 22 hwy | 14 city / 20 hwy | 20–21 city / 24–25 hwy |
| Max Towing | 7,700 lbs | 8,700 lbs | 7,700 lbs | — |
| Seating | 6–7 seats | 7–8 seats | 7 seats | 6–7 seats |
| Drivetrain | All Wheel Drive | Four Wheel Drive | All Wheel Drive | All Wheel Drive |
| Fuel | Premium Unleaded (Required) | Regular Unleaded | Premium Unleaded (Required) | Premium Unleaded (Required) / Premium Unleaded (Recommended) |
Manufacturer figures for the model year shown; a range spans that model's trims. Starting MSRP excludes tax, title, registration, and dealer fees.
Compared with the 2026 Lincoln Navigator, the GLS starts at $90,250 versus $91,995, produces 375–603 hp versus 440 hp, and returns 19 city / 24 highway MPG versus 15 city / 22 highway MPG. The Navigator offers 8,700 pounds of towing, 7–8 seats, Four Wheel Drive, and Regular Unleaded fuel, favoring shoppers who prioritize seating capacity, towing, or regular fuel; the GLS favors buyers seeking a wider power range, All Wheel Drive, and stronger listed highway economy.
Compared with the 2026 Audi SQ7, the GLS starts at $90,250 versus $93,800 and offers 375–603 hp versus 500 hp, while both list 7,700 pounds of maximum towing and All Wheel Drive. The GLS lists 19 city / 24 highway MPG versus the SQ7's 14 city / 20 highway MPG, while both require Premium Unleaded fuel, making the GLS a consideration for shoppers focused on efficiency across a range of power levels.
Compared with the 2026 BMW X7, the GLS starts at $90,250 versus $86,700, with 375–603 hp versus 375–523 hp and 19 city / 24 highway MPG versus 20–21 city / 24–25 highway MPG. Both offer 6–7 seats and All Wheel Drive; the X7's fuel guidance includes Premium Unleaded Required or Recommended, while the GLS requires Premium Unleaded, giving shoppers a clear price, power, and fuel-planning comparison.
Specifications and Configuration
The GLS is a 6–7-seat SUV with All Wheel Drive, an automatic transmission, and premium unleaded fuel required. Across its four-trim range, engine output spans 375–603 hp and torque spans 369–627 lb-ft, with 3.0–4.0-liter engines, six to eight cylinders, and inline or V engine layouts.
Its listed city and highway efficiency are 19 MPG and 24 MPG, respectively. The GLS can tow up to 7,700 pounds, carries 23.8 gallons of fuel, and provides 17.4 cubic feet of cargo space behind the rear seats.
The SUV measures 205 inches long, 79.9 inches wide, and 71.8 inches high, with a 123.4-inch wheelbase and 84.9-inch width including mirrors. Curb weight is 5,523 pounds. The GLS reaches 60 mph in 5.8 seconds, with peak power at 5,500–5,800 rpm and peak torque at 1,800–2,500 rpm.
Buying a 2026 Mercedes-Benz GLS in Sudbury, MA
Mercedes-Benz of Sudbury serves shoppers from 141 Boston Post Road, Rte. 20, in Sudbury, MA. The store receives vehicles on a rolling basis, so the most useful way to check current selection is to search inventory and review live listings.
For a broader purchase plan, shoppers can discuss financing through the dealership, value a current vehicle with the trade-in process, and arrange a visit around the GLS configuration that best fits their needs. Call (351) 217-3575 for assistance from Mercedes-Benz of Sudbury.
What to Weigh Before Buying
Start by comparing the GLS trims through their distinct power and engine configurations. The GLS 450 4MATIC has 375 hp, a 3.0-liter inline-six, and 369 lb-ft of torque; the GLS 580 4MATIC has 510 hp, a 4.0-liter V8, and 538 lb-ft; the AMG GLS 63 has 603 hp, a 4.0-liter V8, and 627 lb-ft.
Consider how often the SUV will carry passengers, tow, or use its available cargo area. Premium fuel is required, and the GLS combines 6–7 seats with 7,700 pounds of maximum towing and 17.4 cubic feet of cargo space behind the rear seats.
Finally, compare the GLS with similarly sized luxury SUVs by looking at starting MSRP, seating, economy, fuel type, drivetrain, power, and towing together rather than focusing on one figure alone.
