2026 Mercedes-Benz GLS Towing Capacity: Up to 7,700 lbs Across the Lineup
The 2026 Mercedes-Benz GLS sits at the top of the brand’s SUV range, pairing three-row luxury with real-world utility. For drivers near El Cajon who need to haul more than passengers, the GLS delivers a maximum towing capacity of 7,700 lbs when properly equipped — a figure that holds across the lineup, from the six-cylinder GLS 450 to the handcrafted V8 of the AMG GLS 63.
That capability rests on standard 4MATIC all-wheel drive and a 9G-TRONIC nine-speed automatic transmission (the AMG GLS 63 uses the AMG SPEEDSHIFT TCT nine-speed), which together manage traction and torque under load. With the right equipment, a properly configured GLS can pull a medium-sized travel trailer, a horse trailer, or comparable loads.
GLS Towing Capacity by Trim
The 2026 GLS comes in four trims. Every one carries the same 7,700-lb maximum when properly equipped — the trims differ in powertrain and price, not in towing ceiling.
| Trim | Engine | Horsepower | Torque | Max Towing | Starting MSRP |
|---|---|---|---|---|---|
| GLS 450 | 3.0L I6 turbo (mild hybrid) | 375 hp | 369 lb-ft | 7,700 lbs | $90,250 MSRP |
| GLS 580 | 4.0L V8 biturbo (mild hybrid) | 510 hp | 538 lb-ft | 7,700 lbs | $116,150 MSRP |
| AMG GLS 63 | Handcrafted 4.0L V8 biturbo | 603 hp | 627 lb-ft | 7,700 lbs | $151,050 MSRP |
| Mercedes-Maybach GLS 600 | 4.0L V8 biturbo (mild hybrid) | 550 hp | 568 lb-ft | 7,700 lbs | ~$180,000 MSRP |
All figures when properly equipped. MSRP includes destination.
MSRP on new inventory covers manufacturer-provided equipment and distributor logistics fees, all of which remain subject to revision. This amount does not account for taxes, registration, dealer-installed additions, or other local charges. MSRP is not a retail advertisement; actual dealer pricing will vary. The dealer sets the final price.
Maximum towing and payload capacity figures are based on properly equipped vehicles and vary by configuration. Do not exceed any weight rating. See your owner’s manual and the vehicle’s door-jamb label for specific capacities.
Across the GLS range, the GLS 450’s turbocharged inline-six delivers smooth, steady power for highway towing, while the GLS 580 and AMG GLS 63 add V8 torque for heavier loads or more reserve on grades. Inside, MBUX runs on dual 12.3-inch displays — a 12.3-inch touchscreen and a 12.3-inch digital instrument cluster.
What You Need to Tow with a GLS
The Factory Trailer Hitch
To reach the maximum 7,700-lb rating, a GLS needs to be properly equipped with the factory-installed trailer hitch, which includes the structural mounting and trailer wiring. Choosing the factory hitch over an aftermarket solution keeps the trailer electrically integrated with the vehicle, so the standard AIRMATIC air suspension and stability systems can account for the added weight and keep the SUV level under tongue load.
If you’re shopping for a GLS ready to tow, you can browse current GLS inventory to find one already equipped with the factory hitch.
Towing Equipment Checklist
For trailers approaching the maximum rating, the following equipment helps you tow safely:
| Equipment | Why It Matters |
|---|---|
| Factory-installed trailer hitch | Required for the 7,700-lb rating; integrates with the vehicle’s suspension and stability systems |
| Weight-distributing hitch | Balances load across axles for trailers near the maximum |
| Correctly rated ball mount | Matches the trailer coupler to the hitch safely |
| Electronic brake controller | Coordinates trailer braking; the GLS is pre-wired for one |
| Properly adjusted towing mirrors | Restores rearward visibility around a wider trailer |
Tongue Weight and Trailer Brake Rules
Tongue weight — the downward force the trailer places on the hitch — is typically around 10% of total trailer weight as a general guideline; staying within that range helps maintain steering and braking stability. Always confirm your specific limits against the owner’s manual and the door-jamb label rather than a rule of thumb.
In California, trailer coaches and camp trailers with a gross weight of 1,500 lbs or more are required to have their own brakes (California DMV); heavier conventional trailers carry their own thresholds, so check current state requirements before towing.
This information is provided for general educational purposes only and does not constitute legal advice. Warranty coverage depends on the specific terms of your vehicle’s warranty agreement. Consult your owner’s manual or a qualified legal professional for guidance on your individual situation.
Towing Technology and Driver Assistance
The GLS pairs its towing capability with the Driver Assistance Package Plus — a suite that’s useful with a trailer attached, and a 360-degree camera system that makes lining up the hitch ball easier, often without a spotter. The following features come standard on all four trims:
| Standard Driver Assistance & Safety Features (All 2026 GLS Trims) |
|---|
| Active Distance Assist DISTRONIC (adaptive cruise) |
| Active Steering Assist (lane centering) |
| Active Blind Spot Assist |
| Active Lane Change Assist |
| Evasive Steering Assist |
| Active Brake Assist with Cross-Traffic Function |
| PRE-SAFE PLUS |
| ATTENTION ASSIST (drowsiness monitoring) |
| Car-to-X Communication |
| Surround View System |
Towing Best Practices
- Perform a lights check before departing to confirm the trailer connector is fully seated.
- Increase following distance to account for the longer stopping distance under a loaded trailer.
- Use Active Distance Assist DISTRONIC to help maintain a safe gap, while staying actively in control — the system assists, it does not replace the driver.
- Check tire pressures on both the SUV and the trailer; heat buildup is a leading cause of tire failure under load.
How the GLS Compares: GLS vs. BMW X7
In the luxury three-row segment, the GLS and the BMW X7 are natural cross-shops. When each is properly equipped with its factory hitch, the GLS holds a 200-lb towing edge — and adds standard AIRMATIC air suspension to help keep the vehicle composed and level under a loaded trailer.
| 2026 Mercedes-Benz GLS | 2026 BMW X7 | |
|---|---|---|
| Max towing (properly equipped) | 7,700 lbs | 7,500 lbs |
| Standard air suspension | AIRMATIC (standard) | Available with towing package |
Fuel Economy While Towing
Towing reduces fuel economy, sometimes substantially, depending on trailer aerodynamics and terrain. The EPA-estimated baseline figures (unladen) by trim are:
| Trim | EPA-Estimated City | EPA-Estimated Highway | EPA-Estimated Combined |
|---|---|---|---|
| GLS 450 | 19 mpg | 24 mpg | 21 mpg |
| GLS 580 | 14 mpg | 19 mpg | 16 mpg |
| AMG GLS 63 | 15 mpg | 20 mpg | 16 mpg |
Expect figures below these baselines while towing, with the drop widening as trailer weight and frontal area increase.
EPA-estimated fuel economy figures are for comparison purposes only. Your actual mileage will vary depending on driving conditions, how you drive and maintain your vehicle, battery age/condition, and other factors.
Warranty and Maintenance for Frequent Towing
Frequent towing counts as severe-service use, so more frequent attention to the cooling system, transmission, and brakes is sensible. The 2026 GLS is backed by the Mercedes-Benz New Vehicle Limited Warranty:
| Coverage | Term |
|---|---|
| Basic (New Vehicle Limited Warranty) | 4 years / 50,000 miles |
| Powertrain | 4 years / 50,000 miles |
| Roadside Assistance | 4 years / 50,000 miles |
For specific roadside contact details, refer to your owner’s manual or the Mercedes me / Mercedes-Benz mobile app.
This information is provided for general educational purposes only and does not constitute legal advice. Warranty coverage depends on the specific terms of your vehicle’s warranty agreement. Consult your owner’s manual or a qualified legal professional for guidance on your individual situation.
Quick Answers: 2026 GLS Towing
Does the 2026 GLS need a factory trailer hitch to reach 7,700 lbs?
Yes — the maximum rating applies when the vehicle is properly equipped with the factory-installed trailer hitch, which keeps the trailer electrically integrated with the vehicle’s suspension and stability systems.
Is a trailer brake controller required?
California requires brakes on trailer coaches and camp trailers with a gross weight of 1,500 lbs or more. The GLS is pre-wired for an electronic brake controller. Confirm the requirement for your specific trailer before towing.
Which GLS trim is best for towing heavier loads or steep grades?
All four trims share the 7,700-lb maximum, but the V8 trims (GLS 580, AMG GLS 63) offer more torque reserve, which can mean less strain maintaining speed on long climbs.
How much will towing affect fuel economy?
Expect a noticeable drop versus the EPA-estimated figures above, varying with trailer weight, aerodynamics, and terrain.
Explore the 2026 GLS in El Cajon
Drivers near El Cajon and across San Diego County can see how the 7,700-lb towing capability fits their needs — whether that’s a trailer for a weekend at Sweetwater Summit Regional Park in Bonita or hauling gear across the region. Mercedes-Benz of El Cajon can help you match a GLS configuration to what you tow.