2019 BMW X6 vs. 2019 Mercedes GLC

Detailed Review, Specifications & Comparison

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When descending a steep, off-road slope, the X6 xDrive’s standard Hill Descent Control allows you to creep down safely. The GLC doesn’t offer Hill Descent Control.

A passive infrared night vision system optional on the X6 helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera to detect heat, the system then displays the image on a monitor in the dashboard. The GLC doesn’t offer a night vision system.

Both the X6 and the GLC have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all wheel drive, around view monitors and driver alert monitors.

The BMW X6 weighs 440 to 1189 pounds more than the Mercedes GLC. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.


The X6’s corrosion warranty is 7 years longer than the GLC’s (12 vs. 5 years).

BMW pays for scheduled maintenance on the X6 for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the GLC.


To reliably power the ignition and other systems and to recharge the battery, the X6 has a standard 210-amp alternator. The GLC’s 150-amp alternator isn’t as powerful.

J.D. Power and Associates rated the X6 first among midsize premium SUVs in their 2018 Initial Quality Study. The GLC was rated third in its category.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks BMW 11th in initial quality, above the industry average. With 5 more problems per 100 vehicles, Mercedes is ranked 14th.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Mercedes vehicles. J.D. Power ranks BMW 8th in reliability, above the industry average. With 20 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks BMW 9 places higher in reliability than Mercedes.


The X6 s/xDrive35i’s standard 3.0 turbo 6 cyl. produces 61 more horsepower (302 vs. 241) and 22 lbs.-ft. more torque (295 vs. 273) than the GLC 300’s standard 2.0 turbo 4 cyl. The X6 xDrive50i’s standard 4.4 turbo V8 produces 83 more horsepower (445 vs. 362) and 95 lbs.-ft. more torque (479 vs. 384) than the AMG GLC 43’s standard 3.0 turbo V6.

As tested in Motor Trend the X6 s/xDrive35i is faster than the GLC 300:




Zero to 60 MPH

5.8 sec

6.9 sec

Quarter Mile

14.5 sec

15.2 sec

Speed in 1/4 Mile

95.9 MPH

89.6 MPH

Fuel Economy and Range

Regenerative brakes improve the X6’s fuel efficiency by converting inertia back into energy instead of wasting it. The GLC doesn’t offer a regenerative braking system.

The X6 has 5 gallons more fuel capacity than the GLC (22.4 vs. 17.4 gallons), for longer range between fill-ups.


The X6’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The GLC doesn’t offer launch control.

Brakes and Stopping

For better stopping power the X6’s brake rotors are larger than those on the GLC:


X6 s/xDrive35i

X6 xDrive50i



Front Rotors

13.7 inches

14.4 inches

13.5 inches

14.2 inches

Rear Rotors

12.6 inches

13.6 inches

12.6 inches

12.6 inches

The X6 stops much shorter than the GLC:





60 to 0 MPH

105 feet

126 feet

Motor Trend

Tires and Wheels

For better traction, the X6 has larger standard tires than the GLC (255/50R19 vs. 235/60R18). The X6’s optional tires are larger than the largest tires available on the GLC (F:275/40R20 & R:315/35R20 vs. F:255/45R20 & R:285/40R20).

The X6’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 GLC’s standard 60 series tires. The X6 xDrive50i’s optional 275/35R21 front and 315/30R21 rear tires have a lower 35 series front and 30 series rear profile than the AMG GLC 43’s 45 series front and 40 series rear tires.

For better ride, handling and brake cooling the X6 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the GLC. The X6 xDrive50i’s optional 21-inch wheels are larger than the 20-inch wheels on the GLC.

The X6 offers an optional space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the GLC; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed.

Suspension and Handling

The X6 offers an available adjustable 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 GLC.

For a smoother ride and more stable handling, the X6’s wheelbase is 2.4 inches longer than on the GLC (115.5 inches vs. 113.1 inches).

For better handling and stability, the track (width between the wheels) on the X6 is .4 inches wider in the front and 2.8 inches wider in the rear than the average track on the GLC.

The X6’s front to rear weight distribution is more even (50.2% to 49.8%) than the GLC’s (53% to 47%). This gives the X6 more stable handling and braking.

The X6 xDrive35i handles at .88 G’s, while the GLC 300 4MATIC pulls only .80 G’s of cornering force in a Motor Trend skidpad test.

The X6 xDrive35i executes Motor Trend’s “Figure Eight” maneuver 1.2 seconds quicker than the GLC 300 4MATIC (26.1 seconds @ .71 average G’s vs. 27.3 seconds @ .65 average G’s).

For greater off-road capability the X6 has a 3.3 inches greater minimum ground clearance than the GLC 300 (8.3 vs. 5 inches), allowing the X6 to travel over rougher terrain without being stopped or damaged. The X6’s minimum ground clearance is 1.6 inches higher than on the AMG GLC 43 (8.3 vs. 6.7 inches).

Passenger Space

The X6 has 2.1 inches more front headroom, 3.2 inches more front shoulder room and 1.4 inches more rear shoulder room than the GLC.

Cargo Capacity

The X6 has a much larger cargo area with its rear seat up than the GLC with its rear seat up (26.6 vs. 19.4 cubic feet). The X6 has a much larger cargo area with its rear seat folded than the GLC with its rear seat folded (59.7 vs. 56.5 cubic feet).


The X6’s standard towing capacity is much higher than the GLC’s (6000 vs. 3500 pounds).


Heated windshield washer nozzles are standard on the X6 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. Heated windshield washer nozzles cost extra on the GLC.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The X6 offers available headlight washers to keep headlight output high. The GLC doesn’t offer headlight washers.

Economic Advantages

Insurance will cost less for the X6 owner. The Car Book by Jack Gillis rates the X6 with a number “1” insurance rate while the GLC is rated higher at a number “10” rate.

According to The Car Book by Jack Gillis, the X6 is less expensive to operate than the GLC because typical repairs cost less on the X6 than the GLC, including $30 less for a starter and $101 less for fuel injection.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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