2020 Mercedes GLS vs. 2020 GMC Yukon

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2019 Advanta-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. 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. 6IUEX-0KENZ 45.55.47.189 2019/12/13

For enhanced safety, the front and middle 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 doesn’t offer pretensioners for the middle 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 doesn’t offer pre-crash pretensioners.

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

When descending a steep, off-road slope, the GLS’ standard Downhill Speed Regulation allows you to creep down safely. The Yukon doesn’t offer Downhill Speed Regulation.

The GLS has a standard Surround View System to allow the driver to see objects all around the vehicle on a screen. The Yukon only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

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

Both the GLS and the Yukon have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available lane departure warning systems.

Warranty

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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’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.

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

Reliability

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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 the engines in the Yukon.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than GMC vehicles. J.D. Power ranks Mercedes 13th in reliability, above the industry average. With 27 more problems per 100 vehicles, GMC is ranked 22nd.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Mercedes vehicles are more reliable than GMC vehicles. Consumer Reports ranks Mercedes 8 places higher in reliability than GMC.

Engine

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The GLS 450’s standard 3.0 turbo 6 cyl. hybrid produces 7 more horsepower (362 vs. 355) than the Yukon’s standard 5.3 V8. The GLS 580’s standard 4.0 turbo V8 hybrid produces 63 more horsepower (483 vs. 420) and 56 lbs.-ft. more torque (516 vs. 460) than the Yukon Graphite Performance Edition/Denali’s standard 6.2 V8.

Fuel Economy and Range

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On the EPA test cycle the GLS 450 gets better fuel mileage than the Yukon 4WD (19 city/23 hwy vs. 15 city/21 hwy).

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

In heavy traffic or at stoplights the GLS’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Yukon doesn’t offer an automatic engine start/stop system.

Environmental Friendliness

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In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes GLS higher (6 out of 10) than the GMC Yukon (3). This means the GLS produces up to 23.4 pounds less smog-producing pollutants than the Yukon every 15,000 miles.

Brakes and Stopping

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

GLS

Yukon

Front Rotors

14.8 inches

13 inches

Tires and Wheels

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The GLS’ tires provide better handling because they have a lower 50 series profile (height to width ratio) that provides a stiffer sidewall than the Yukon SLE/SLT’s standard 65 series tires.

For better ride, handling and brake cooling the GLS has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Yukon SLE/SLT. The GLS’ optional 23-inch wheels are larger than the 22-inch wheels optional on the Yukon.

Suspension and Handling

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For superior ride and handling, the Mercedes GLS has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The GMC Yukon has a solid rear axle, with a non-independent rear suspension.

The GLS has standard front and rear stabilizer bars, which help keep the GLS flat and controlled during cornering. The Yukon’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 Yukon, 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.

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 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the GLS’ wheelbase is 7.4 inches longer than on the Yukon (123.4 inches vs. 116 inches).

For greater off-road capability the GLS has a 2.1 inches greater minimum ground clearance than the Yukon (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 3.3 inches higher than on the Yukon (11.3 vs. 8 inches).

Chassis

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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 uses body-on-frame design instead.

Passenger Space

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The GLS has 1.5 inches more rear headroom, 2.9 inches more rear legroom and 9.8 inches more third row legroom than the Yukon.

For enhanced passenger comfort on long trips the GLS’ middle and third row seats recline. The Yukon’s third row seats don’t recline.

Cargo Capacity

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The GLS’ cargo area provides more volume than the Yukon.

GLS

Yukon

Behind Third Seat

17.4 cubic feet

15.3 cubic feet

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 doesn’t offer seats that fold into the floor.

Towing

© 1999 - 2019 Advanta-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. 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. 6IUEX-0KENZ 45.55.47.189 2019/12/13

The GLS’ standard towing capacity is much higher than the Yukon’s (7700 vs. 6300 pounds).

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than GMC. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 30% lower rating, GMC is ranked 14th.

Ergonomics

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Unlike the driver-only memory system in the Yukon SLT Standard/SLT/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’ power parking brake sets with one touch and releases with one touch or automatically. The Yukon’s parking brake has to released manually.

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’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 can only operate the windows from inside the vehicle, with the ignition on.

To help drivers avoid possible obstacles, the GLS has standard cornering lights to illuminate around corners when the turn signals are activated. The Yukon 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.

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.

Optional air conditioned the front and second row seats keep the GLS’ passengers comfortable and take the sting out of hot leather in summer. The Yukon doesn’t offer air-conditioned seats for the second row.

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 Yukon.

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 Denali offers wireless charging.

The GLS’ Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The Yukon doesn’t offer an automated parking system.

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