Compare the2023 Mercedes GLSVS 2023 GMC Yukon XL

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

Safety

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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 GMC Yukon XL 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 Yukon XL 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 Yukon XL 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 Yukon XL 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 Yukon XL.

The GLS has a standard blind spot warning system which uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the Yukon XL’s blind spot costs extra.

To help make backing out of a parking space safer, the GLS has a standard rear cross-path warning system, which uses sensors in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. Rear cross-path warning costs extra on the Yukon XL.

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 Yukon XL 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 Yukon XL uses a body-on-frame design, which has no frame members above the floor of the vehicle.

Both the GLS and the Yukon XL 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, rearview cameras and available lane departure warning systems.

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 Yukon XL’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 Yukon XL’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 Yukon XL.

Engine

The GLS has more powerful engines than the Yukon XL:

	Horsepower	Torque
GLS 450 3.0 turbo 6-cylinder hybrid	362 HP	369 lbs.-ft.
GLS 580 4.0 turbo V8 hybrid	483 HP	516 lbs.-ft.
Maybach GLS 600 4.0 turbo V8 hybrid	550 HP	538 lbs.-ft.
Yukon XL 5.3 V8	355 HP	383 lbs.-ft.
Yukon XL Denali 6.2 V8	420 HP	460 lbs.-ft.

Fuel Economy and Range

On the EPA test cycle the GLS gets better mileage than the Yukon XL:

			MPG
GLS
	AWD	580 4.0 turbo V8 Hybrid	16 city/21 hwy
		Maybach GLS 600 4.0 turbo V8 Hybrid	15 city/20 hwy
		3.0 turbo 6-cyl. Hybrid	18 city/23 hwy
Yukon XL
	RWD	5.3 OHV V8	15 city/20 hwy
		6.2 OHV V8	14 city/19 hwy
	AWD	5.3 OHV V8	15 city/19 hwy
		6.2 OHV V8	14 city/19 hwy

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

Brakes and Stopping

For better stopping power the GLS’ brake rotors are larger than those on the Yukon XL:

	GLS	Yukon XL
Front Rotors	14.8 inches	13.5 inches

Tires and Wheels

For better traction, the GLS has larger standard tires than the Yukon XL (275/50R20 vs. 265/65R18). The GLS’ optional tires are larger than the largest tires available on the Yukon XL (F:285/40R23 & R:325/35R23 vs. 275/60R20).

The GLS 450’s standard tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Yukon XL’s standard 65 series tires. The GLS’ optional 285/40R23 front and 325/35R23 rear tires have a lower 40 series front and 35 series rear profile than the Yukon XL’s optional 50 series tires.

For better ride, handling and brake cooling the GLS 450 has standard 20-inch wheels. Smaller 18-inch wheels are standard on the Yukon XL. The GLS’ optional 23-inch wheels are larger than the 22-inch wheels optional on the Yukon XL.

Suspension and Handling

The front and rear suspension of the GLS uses air springs for a smoother, controlled ride than the Yukon XL, 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. GMC doesn’t offer an active suspension on the Yukon XL.

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 Yukon XL doesn’t offer drift compensation steering.

For better maneuverability, the GLS’ turning circle is 2.9 feet tighter than the Yukon XL’s (39.4 feet vs. 42.3 feet). The GLS’ turning circle is 3.9 feet tighter than the Yukon XL w/20-22 inch wheels’ (39.4 feet vs. 43.3 feet).

For greater off-road capability the GLS has a 2.1 inches greater minimum ground clearance than the Yukon XL (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 Yukon XL Air Ride (11.3 vs. 10 inches).

Chassis

The GLS 450 is 1 foot, 8.3 inches shorter than the Yukon XL, 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 Yukon XL uses body-on-frame design instead.

Passenger Space

The GLS has 1.3 inches more rear headroom and .7 inches more third row headroom than the Yukon XL.

Cargo Capacity

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

Towing

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

Ergonomics

Unlike the driver-only memory system in the Yukon XL SLT/AT4/Denali, 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 Yukon XL’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. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the Yukon XL can only close the windows from inside the vehicle, with the ignition on.

The GLS has a standard locking fuel door with a remote release located convenient to the driver. A locking fuel door helps prevent fuel theft and vandalism, such as sugar in the tank. The Yukon XL doesn’t offer a locking fuel door.

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 Yukon XL 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 Yukon XL 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 Yukon XL 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 Yukon XL doesn’t offer rear side window sunshades.

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. GMC doesn’t offer heated seats in the third row of the Yukon XL.

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 Yukon XL 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 Yukon XL doesn’t offer a third row rear seat center armrest.

Both the GLS and the Yukon XL offer available massaging front seats. The GLS also offers optional massaging second row seats in order to maximize comfort and eliminate fatigue on long trips. Massaging second row seats aren’t available in the Yukon XL.

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 and one for the rear passengers. Only the Yukon XL SLT/AT4/Denali offers wireless charging.

Economic Advantages

According to The Car Book by Jack Gillis, the GLS is less expensive to operate than the Yukon XL 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 Yukon XL, including $318 less for a muffler, $91 less for a fuel pump and $865 less for a timing belt/chain.