2019 BMW X7 vs. 2019 Mercedes GLS

Detailed Review, Specifications & Comparison

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Safety

The X7 has standard Post-Crash Braking, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The GLS 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 help make backing safer, the X7’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The GLS doesn’t offer a cross-path warning system.

Both the X7 and the GLS have standard driver and passenger frontal airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors and available around view monitors.

Warranty

The X7’s corrosion warranty is 7 years longer than the GLS’ (12 vs. 5 years).

BMW pays for scheduled maintenance on the X7 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 GLS.

Reliability

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.

Fuel Economy and Range

On the EPA test cycle the X7 gets better fuel mileage than the GLS:

 

 

 

MPG

X7

 

 

xDrive40i 3.0 turbo 6 cyl.

20 city/25 hwy

 

 

xDrive50i 4.4 turbo V8

15 city/21 hwy

GLS

 

 

450 3.0 turbo V6

16 city/22 hwy

 

 

550 4.7 turbo V8

14 city/19 hwy

 

 

AMG 63 5.5 turbo V8

13 city/18 hwy

Regenerative brakes improve the X7’s fuel efficiency by converting inertia back into energy instead of wasting it. The GLS doesn’t offer a regenerative braking system.

Transmission

The X7’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 GLS doesn’t offer launch control.

Tires and Wheels

For better traction and acceleration, the X7 has larger standard rear tires than the GLS (315/35R22 vs. 275/55R19).

The X7’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the GLS’ standard 55 series tires. The X7’s optional 315/35R22 rear tires have a lower 35 series profile than the GLS 550/63’s 40 series tires.

For better ride, handling and brake cooling the X7 has standard 21-inch wheels. Smaller 19-inch wheels are standard on the GLS.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the X7 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The GLS doesn’t offer run-flat tires.

Suspension and Handling

For a smoother ride and more stable handling, the X7’s wheelbase is 1.1 inches longer than on the GLS (122.2 inches vs. 121.1 inches).

For greater off-road capability the X7 has a greater minimum ground clearance than the AMG GLS 63 (8.7 vs. 7.8 inches), allowing the X7 to travel over rougher terrain without being stopped or damaged.

Chassis

The design of the BMW X7 amounts to more than styling. The X7 offers aerodynamic coefficients of drag from .33 to .34 Cd (depending on bodystyle and options). That is significantly lower than the GLS (.37 to .38) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the X7 get better fuel mileage.

The front grille of the X7 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

The X7 has .7 inches more front headroom and 1.5 inches more front shoulder room than the GLS.

Cargo Capacity

The X7’s rear cargo window opens separately from the rest of the tailgate door to allow quicker loading of small packages. The GLS’ rear cargo window doesn’t open.

Ergonomics

The X7’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. An easy entry system costs extra on the GLS.

The X7 offers an optional heads-up display that projects speed and other key instrumentation readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The GLS doesn’t offer a heads-up display.

To improve rear visibility by keeping the rear window clear, the X7 has a standard rear variable 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.

The X7 has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the GLS.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW X7 has a standard wireless phone charging system (Qi) for the front seat. The GLS doesn’t offer wireless personal charging.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the BMW X7 has a standard wireless phone charging system (Qi) for the front seat. The GLS doesn’t offer wireless personal charging.

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

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