Certified Benz & Beemer Compares 2015 Infiniti QX80 VS 2015 Mercedes GL-Class Near Scottsdale, AZ

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2015 Infiniti QX80

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2015 Mercedes GL-Class

Safety Comparison

For enhanced safety, the front and middle seat shoulder belts of the Infiniti QX80 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Mercedes GL-Class doesn’t offer height-adjustable middle seat belts.

Over 200 people are killed each year when backed over by motor vehicles. The QX80 offers optional Backup Collision Intervention which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The GL-Class doesn’t offer backup collision prevention brakes.

Both the QX80 and the GL-Class have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height-adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding and available all-wheel drive.

Warranty Comparison

The QX80 comes with a full 4 year/60,000 mile basic warranty, which covers the entire truck and includes 24 hour roadside assistance. The GL-Class’ 4 year/50,000 mile basic warranty expires 10,000 miles sooner.

Infiniti’s powertrain warranty covers the QX80 2 years and 20,000 miles longer than Mercedes covers the GL-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the GL-Class ends after only 4 years or 50,000 miles.

The QX80’s corrosion warranty is 3 years and unlimited miles longer than the GL-Class’ (7/unlimited vs. 4/50,000).

Reliability Comparison

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without their vehicle while it’s being repaired. Consumer Reports predicts that the QX80’s reliability will be 33% better than the GL-Class.

J.D. Power and Associates rated the QX80 first among large premium suvs in their 2013 Initial Quality Study. The GL-Class isn’t in the top three.

Engine Comparison

The QX80’s 5.6 DOHC V8 produces 38 more horsepower (400 vs. 362) and 44 lbs.-ft. more torque (413 vs. 369) than the GL450’s standard 3.0 turbo V6.

Fuel Economy and Range Comparison

To lower fuel costs and make buying fuel easier, the Infiniti QX80 uses regular unleaded gasoline (premium recommended for maximum performance). The GL-Class requires premium, which can cost 20 to 55 cents more per gallon.

Brakes and Stopping Comparison

The QX80 stops shorter than the GL-Class:



60 to 0 MPH

121 feet

121.9 feet


Tires and Wheels Comparison

For better ride, handling and brake cooling the QX80 has standard 20-inch wheels. Smaller 19-inch wheels are standard on the GL-Class. The QX80’s optional 22-inch wheels are larger than the 21-inch wheels on the GL550/GL63 AMG.

The Infiniti QX80’s wheels have 6 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Mercedes GL-Class only has 5 wheel lugs per wheel.

Suspension and Handling Comparison

The QX80 offers an available active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Mercedes doesn’t offer an active suspension on the GL-Class.

For better handling and stability, the track (width between the wheels) on the QX80 is 2.1 inches wider in the front and 1.7 inches wider in the rear than the average track on the GL-Class.

The QX80 AWD handles at .73 G’s, while the GL350 BlueTEC pulls only .68 G’s of cornering force in a AutoWeek skidpad test.

Chassis Comparison

The design of the Infiniti QX80 amounts to more than styling. The QX80 has an aerodynamic coefficient of drag of .36 Cd. That is lower than the GL-Class (.369 to .377). A more efficient exterior helps keep the interior quieter and helps the QX80 get better fuel mileage.

Passenger Space Comparison

The QX80 offers optional seating for 8 passengers; the GL-Class can only carry 7.

The QX80 has 5.3 inches more front shoulder room, 2.5 inches more rear legroom, 5.2 inches more rear shoulder room and 10 inches more third row shoulder room than the GL-Class.

For enhanced passenger comfort on long trips the QX80’s middle and third row seats recline. The GL-Class’ third row seats don’t recline.

Cargo Capacity Comparison

The QX80’s cargo area provides more volume than the GL-Class.



Behind Third Seat

16.6 cubic feet

16 cubic feet

Third Seat Folded

49.6 cubic feet

49.4 cubic feet

Second Seat Folded

95.1 cubic feet

93.8 cubic feet

Ergonomics Comparison

The QX80 has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The GL-Class doesn’t offer a remote starting system.

The QX80’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. An easy entry system costs extra on the GL-Class.

The QX80’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 GL-Class does not have an oil pressure gauge.

To improve rear visibility by keeping the rear window clear, the QX80 has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GL-Class only has an intermittent setting, so in a hard rain visibility isn’t as good.

Consumer Reports rated the QX80’s headlight performance “Very Good,” a higher rating than the GL-Class’ headlights, which were rated “Good.”

The QX80 has a standard heated steering wheel to take the chill out of steering on extremely cold Winter days before the vehicle heater warms up. A heated steering wheel costs extra on the GL-Class.

Economic Advantages Comparison

Insurance will cost less for the QX80 owner. The Complete Car Cost Guide estimates that insurance for the QX80 will cost $3005 to $8165 less than the GL-Class over a five-year period.

The QX80 will cost the buyer less in the long run because of its superior resale value. The Intellichoice estimates that the QX80 will retain 48.94% to 49.6% of its original price after five years, while the GL-Class only retains 42.57% to 48.29%.

According to The Car Book by Jack Gillis, the QX80 is less expensive to operate than the GL-Class because it costs $278 less to do the manufacturer’s suggested maintenance for 50,000 miles. Typical repairs cost much less on the QX80 than the GL-Class, including $347 less for a water pump, $338 less for an alternator, $252 less for front brake pads, $147 less for a starter and $305 less for front struts.

Intellichoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Infiniti QX80 will be $2332 to $55629 less than for the Mercedes GL-Class.

Recommendations Comparison

Consumer Reports® recommends the Infiniti QX80, based on reliability, safety and performance. The Mercedes GL-Class isn't recommended.

J.D. Power and Associates rated the QX80 second among large premium suvs in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The GL-Class was rated third.

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