Compare the2025 Mercedes GLSVS 2025 Chevrolet Suburban

Safety
Warranty
Reliability
Engine
Fuel Economy and Range
Brakes and Stopping
Tires and Wheels
Suspension and Handling
Chassis
Cargo Capacity
Towing
Ergonomics
Economic Advantages
Recommendations

Safety

© 1999 - 2024Advanta-STAR Automotive Research, all rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America (“Advanta-STAR”). If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it, or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. Removal of this watermark/notification without prior written license and approval received from Advanta-STAR is an agreement, understanding, and/or stipulation by the person(s), entities, agents, attorneys, and any other persons involved in the removal of this watermark/notification (including but not limited to Search Optics, LLC and any and all parent entities, sister entities, and subsidiary entities of Search Optics, LLC and/or any other entity, agent, attorney, and persons related in any manner to Search Optics, LLC) to: 1) an agreed upon amount of liquidated monetary damages of a minimum of $1,250,000.00 US Dollars in favor of Advanta-STAR; 2) the jurisdiction and enforcement of any legal claims associated with this matter asserted by Advanta-STAR in the United States Federal District Court in Portand, Oregon; and 3) service of process of any legal claims asserted by Advanta-STAR associated with this matter may be accomplished by First-Class Postage by the United States Postal Service or comparable service. XPYNN-M34HG 2a06:98c0:3600::103 2024/12/22

For enhanced safety, the front and second-row seat shoulder belts of the Mercedes GLS have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Chevrolet Suburban doesn’t offer pretensioners for its second-row seat belts.

The GLS’ pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Suburban doesn’t offer pre-crash pretensioners.

The Mercedes GLS has a standard driver’s side knee airbag mounted low on the dashboard. The knee airbag helps prevent the driver from sliding under the seatbelts or the main frontal airbag; this keeps the driver better positioned during a collision for maximum protection. A knee airbag also helps keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Suburban doesn’t offer knee airbags.

The GLS offers an optional Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Suburban doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the GLS. But it costs extra on the Suburban.

Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The GLS has Car-to-X Communication, a system that seamlessly communicates important warnings to the driver about impending danger, if they're available. The Suburban doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.

The GLS’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Suburban doesn’t offer a driver alert monitor.

For better protection of the passenger compartment, the GLS uses safety cell construction with a three-dimensional high-strength frame that surrounds the passenger compartment. It provides extra impact protection and a sturdy mounting location for door hardware and side impact beams. The Suburban uses a body-on-frame design, which has no frame members above the floor of the vehicle.

Both the GLS and the Suburban have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The GLS comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Suburban’s 3-year/36,000-mile basic warranty expires 1 year or 14,000 miles sooner.

The GLS’ corrosion warranty is unlimited miles longer than the Suburban’s (unlimited vs. 100,000 miles).

Reliability

For smoother operation, better efficiency and fewer moving parts, the engines in the GLS have an overhead cam design, rather than the old pushrod design of some of the engines in the Suburban.

Engine

The GLS has more powerful engines than the Suburban:

	Horsepower	Torque
GLS 450 3.0 turbo 6-cylinder hybrid	375 HP	369 lbs.-ft.
GLS 580 4.0 turbo V8 hybrid	510 HP	538 lbs.-ft.
Maybach GLS 600 4.0 turbo V8 hybrid	550 HP	538 lbs.-ft.
Suburban 5.3 V8	355 HP	383 lbs.-ft.
Suburban 6.2 V8	420 HP	460 lbs.-ft.

As tested in Motor Trend the GLS 450 3.0 turbo 6-cylinder hybrid is faster than the Chevrolet Suburban 5.3 V8:

	GLS	Suburban
Zero to 60 MPH	5.5 sec	7.6 sec
Quarter Mile	14 sec	15.7 sec
Speed in 1/4 Mile	99.8 MPH	89.6 MPH

Fuel Economy and Range

On the EPA test cycle the GLS gets better mileage than the Suburban:

			MPG
GLS
	AWD	580 4.0 turbo V8 Hybrid	14 city/19 hwy
		3.0 turbo 6-cyl. Hybrid	19 city/24 hwy
Suburban
	RWD	5.3 OHV V8	15 city/20 hwy
		6.2 OHV V8	14 city/20 hwy
	AWD	5.3 OHV V8	15 city/18 hwy
		6.2 OHV V8	14 city/18 hwy

Regenerative brakes improve the GLS’ fuel efficiency by converting inertia back into energy instead of wasting it. The Suburban doesn’t offer a regenerative braking system.

The GLS has a standard locking fuel door which locks and unlocks with the power locks. The fuel filler door is not lockable on the Suburban. A locking fuel door helps prevent fuel theft and vandalism, such as sugar in the tank.

Brakes and Stopping

For better stopping power the GLS’ standard brake rotors are larger than those on the Suburban:

	GLS	Suburban
Front Rotors	14.8 inches	13.5 inches

The GLS stops much shorter than the Suburban:

	GLS	Suburban
60 to 0 MPH	107 feet	127 feet	Motor Trend
60 to 0 MPH (Wet)	143 feet	150 feet	Consumer Reports

Tires and Wheels

For better traction, the GLS has larger standard tires than the Suburban (F:275/45R21 & R:315/40R21 vs. 265/65R18).

The GLS’ standard 275/45R21 front and 315/40R21 rear tires provide better handling because they have a lower 45 series front and 40 series rear profile (height to width ratio) that provides a stiffer sidewall than the Suburban’s standard 65 series tires. The GLS’ optional 325/35R23 rear tires have a lower 35 series profile than the Suburban RST’s optional 40 series tires.

For better ride, handling and brake cooling the GLS has standard 21-inch wheels. Smaller 18-inch wheels are standard on the Suburban.

Suspension and Handling

The GLS has standard front and rear stabilizer bars, which help keep the GLS flat and controlled during cornering. The Suburban’s suspension doesn’t offer a rear stabilizer bar.

The front and rear suspension of the GLS uses air springs for a smoother, controlled ride than the Suburban, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The GLS offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Chevrolet doesn’t offer an active suspension on the Suburban.

The GLS has vehicle speed sensitive variable-assist power steering, for low-effort parking, better control at highway speeds and during hard cornering, and a better feel of the road. The Suburban doesn’t offer variable-assist power steering.

The GLS’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The Suburban doesn’t offer drift compensation steering.

The GLS 450 handles at .92 G’s, while the Suburban High Country 4WD pulls only .53 G’s of cornering force in a Car and Driver skidpad test.

The Maybach GLS 600 executes Motor Trend’s “Figure Eight” maneuver 4.4 seconds quicker than the Suburban Z71 4WD (26.5 seconds @ .69 average G’s vs. 30.9 seconds @ .5 average G’s).

For better maneuverability, the Maybach GLS 600’s turning circle is 9 feet tighter than the Suburban RST 4WD w/24 inch wheels’ (35.7 feet vs. 44.7 feet).

For greater off-road capability the GLS has a 2.1 inches greater minimum ground clearance than the Suburban (10.1 vs. 8 inches), allowing the GLS to travel over rougher terrain without being stopped or damaged. The GLS Off-Road Package’s minimum ground clearance is 1.3 inches higher than on the Suburban Z71 Air Ride (11.3 vs. 10 inches).

Chassis

The GLS 450 is 1 foot, 9.4 inches shorter than the Suburban, making the GLS easier to handle, maneuver and park in tight spaces.

Unibody construction lowers the GLS’ center of gravity significantly without reducing ground clearance. This contributes to better on the road handling and better off-road performance and stability. In addition, unibody construction makes the chassis stiffer, improving handling and reducing squeaks and rattles. The Suburban doesn’t use unibody construction, but a body-on-frame design.

Cargo Capacity

A low lift-over cargo hatch design makes loading and unloading the GLS easier. The GLS’ cargo hatch lift-over height is 31.8 inches, while the Suburban’s liftover is 37 inches.

The GLS has a standard third row seat which folds flat into the floor. This completely clears a very large cargo area quickly. The Suburban doesn’t offer seats that fold into the floor.

Towing

The GLS’ standard towing capacity is much higher than the Suburban’s (7700 vs. 7500 pounds).

Ergonomics

Unlike the driver-only memory system in the Suburban LT/RST/Z71/Premier/High Country, the GLS has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, suspension setting, power steering assist, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.

The GLS’ front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The Suburban’s rear power window switches have to be held the entire time to close them fully.

If the windows are left open on the GLS the driver can close them all at the outside door handle or from a distance using the remote (remote must be aimed at door sensor). On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Suburban can only close the windows from inside the vehicle, with the ignition on.

Heated windshield washer fluid is optional on the GLS to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The Suburban doesn’t offer heated windshield washer fluid.

To help drivers avoid possible obstacles, the GLS has standard cornering lights to illuminate around corners when the turn signals are activated. The Suburban doesn’t offer cornering lights. The GLS also has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.

To better shield the driver and front passenger’s vision, the GLS has standard dual-element sun visors that can block glare from two directions simultaneously. The Suburban doesn’t offer secondary sun visors.

Manual rear side window sunshades are available in the GLS to help block heat and glare for the rear passengers. The Suburban doesn’t offer rear side window sunshades.

The Mercedes GLS has power folding mirrors that offer unparalleled convenience while maneuvering in tight places or parked. With the mirrors folded it’s easier to walk past and help prevent parking damage. The mirrors can be quickly unfolded when the driver is ready to leave. Power folding mirrors costs extra on the Suburban and aren't offered on the LS.

The GLS has standard heated front and optional heated second and third row seats, which keep the driver and passengers extremely comfortable in the winter. Chevrolet doesn’t offer heated seats in the third row of the Suburban.

The GLS has standard front air conditioned seats and offers them optionally in the second row. This keeps the passengers comfortable and takes the sting out of hot seats in summer. The Suburban doesn’t offer air-conditioned seats for the second row.

The GLS offers an optional center folding armrest for the third row rear passengers. A center armrest helps make rear passengers more comfortable and can provide a barrier between children. The Suburban doesn’t offer a third row rear seat center armrest.

The GLS offers optional massaging front and second row seats, which keep the driver and middle row passengers. Massaging seats aren’t available in the Suburban.

The Mercedes GLS has a standard Homelink wireless remote control system for garage door operation and device management, conveniently located on the rear view mirror. Homelink® eliminates the need for separate garage door openers and associated risks of losing, breaking, or having dead batteries. Chevrolet charges extra for Homelink® on the Suburban.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes GLS has a standard wireless phone charging system (Qi) in the center console. Only the Suburban LT/RST/Z71/Premier/High Country offers wireless charging. The GLS also offers Qi charging in the second row seat. The Suburban doesn’t offer wireless charging in its second row seat.

Economic Advantages

According to The Car Book by Jack Gillis, the GLS is less expensive to operate than the Suburban because it costs $218 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the GLS than the Suburban, including $66 less for a fuel pump and $865 less for a timing belt/chain.

Recommendations

J.D. Power and Associates rated the GLS third among large premium suvs in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Suburban isn’t in the top three in its category.

See Available Inventory