2021 Chevrolet Tahoe vs. 2020 Mercedes GLS

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 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 2020/08/11

In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Tahoe are reminded to check the back seat if they opened the rear door before starting out. The GLS doesn’t offer a back seat reminder.

The Tahoe has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The GLS doesn’t offer front seat center airbags.

Both the Tahoe and the GLS 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, crash mitigating brakes, daytime running lights, rearview cameras, available all-wheel drive, lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

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Chevrolet’s powertrain warranty covers the Tahoe 1 year and 10,000 miles longer than Mercedes covers the GLS. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the GLS ends after only 4 years or 50,000 miles.

The Tahoe’s corrosion warranty is 1 year longer than the GLS’ (6 vs. 5 years).

There are almost 8 times as many Chevrolet dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Tahoe’s warranty.

Reliability

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J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Chevrolet vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Chevrolet 6th in initial quality, above the industry average. With 9 more problems per 100 vehicles, Mercedes is ranked 12th, below the industry average.

J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Chevrolet vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Chevrolet fourth in reliability, above the industry average. With 19 more problems per 100 vehicles, Mercedes is ranked 13th.

Engine

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The Tahoe’s standard 5.3 V8 produces 14 lbs.-ft. more torque (383 vs. 369) than the GLS 450’s standard 3.0 turbo 6-cylinder hybrid.

The Tahoe’s 3.0 turbo diesel produces 91 lbs.-ft. more torque (460 vs. 369) than the GLS 450’s standard 3.0 turbo 6-cylinder hybrid.

Fuel Economy and Range

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An engine control system that can shut down some of the engine’s cylinders helps improve the Tahoe V8’s fuel efficiency. The GLS doesn’t offer a system that can shut down part of the engine.

To lower fuel costs and make buying fuel easier, the Chevrolet Tahoe uses regular unleaded gasoline (premium recommended on Tahoe High Country for maximum performance). The GLS requires premium, which can cost 20 to 55 cents more per gallon.

Transmission

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A 10-speed automatic is standard on the Chevrolet Tahoe, for better acceleration and lower engine speed on the highway. Only a nine-speed automatic is available for the GLS.

Tires and Wheels

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For better traction, the Tahoe has larger standard tires than the GLS (265/65R18 vs. 255/50R19). The Tahoe’s optional tires are larger than the largest tires available on the GLS (275/65R20 vs. 255/50R19).

The Chevrolet Tahoe’s wheels have 6 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Mercedes GLS only has 5 wheel lugs per wheel.

The Tahoe has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The GLS doesn’t offer vehicle monitored tire inflation.

The Tahoe has a standard full size spare tire so a flat doesn’t interrupt your trip. A full size spare isn’t available on the GLS; it requires you to depend on roadside assistance and your vehicle will have to be towed.

Suspension and Handling

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For better handling and stability, the track (width between the wheels) on the Tahoe is 2.8 inches wider in the front and 1.7 inches wider in the rear than on the GLS.

For better maneuverability, the ’s turning circle is 39.4 feet tighter than the GLS’ ( feet vs. 39.4 feet).

Chassis

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The front grille of the Tahoe uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The GLS doesn’t offer active grille shutters.

Passenger Space

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The Tahoe offers optional seating for 9 passengers; the GLS can only carry 7.

The Tahoe has 2.9 inches more front headroom, 4.2 inches more front legroom, .1 inches more rear legroom and .3 inches more third row legroom than the GLS.

Cargo Capacity

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The Tahoe’s cargo area provides more volume than the GLS.

Tahoe

GLS

Behind Third Seat

25.5 cubic feet

17.4 cubic feet

Third Seat Folded

72.6 cubic feet

42.7 cubic feet

Second Seat Folded

122.9 cubic feet

84.7 cubic feet

Towing

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The Tahoe 4WD with optional equipment can be flat towed on all four wheels (dinghy towed), allowing recreational vehicle owners to bring it with them on the road. When they reach their destination, the Tahoe can be unhitched and driven around locally. The GLS can’t be towed flat on the ground.

Ergonomics

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The Tahoe’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The GLS does not have an oil pressure gauge.

To improve rear visibility by keeping the rear window clear, the Tahoe has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GLS only has an intermittent setting, so in a hard rain visibility isn’t as good.

Model Availability

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The Tahoe is available in both rear-wheel drive and four-wheel drive configurations. The GLS doesn’t offer a two-wheel drive configuration.

Recommendations

© 1999 - 2020 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 2020/08/11

The Chevrolet Tahoe outsold the Mercedes GLS by almost five to one during 2019.

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