2020 Mercedes CLS vs. 2019 BMW 6 Series Gran Turismo

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front seat shoulder belts of the Mercedes CLS 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 BMW 6 Series Gran Turismo doesn’t offer height-adjustable seat belts.

Both the CLS and the 6 Series Gran Turismo have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, driver alert monitors, available all wheel drive, lane departure warning systems, around view monitors and rear cross-path warning.

Warranty

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There are over 10 percent more Mercedes dealers than there are BMW dealers, which makes it easier should you ever need service under the CLS’ warranty.

Reliability

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J.D. Power and Associates rated the CLS first among midsize premium cars in their 2019 Initial Quality Study. The 6 Series Gran Turismo isn’t in the top three in its category.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than BMW vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 8 more problems per 100 vehicles, BMW is ranked 20th.

Engine

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The CLS’ 3.0 turbo 6 cyl. hybrid produces 27 more horsepower (362 vs. 335) and 39 lbs.-ft. more torque (369 vs. 330) than the 6 Series Gran Turismo’s 3.0 turbo 6 cyl.

Fuel Economy and Range

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On the EPA test cycle the CLS gets better fuel mileage than the 6 Series Gran Turismo:

MPG

CLS

RWD

2.0 Turbo V6

24 city/31 hwy

AWD

3.0 Turbo V6

23 city/30 hwy

6 Series Gran Turismo

AWD

3.0 Turbo V6

20 city/28 hwy

The CLS has 3.1 gallons more fuel capacity than the 6 Series Gran Turismo (21.1 vs. 18 gallons), for longer range between fill-ups.

Environmental Friendliness

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

Transmission

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A nine-speed automatic is standard on the Mercedes CLS, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the 6 Series Gran Turismo.

Brakes and Stopping

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For better stopping power the CLS’ brake rotors are larger than those on the 6 Series Gran Turismo:

CLS

6 Series Gran Turismo

Front Rotors

14.2 inches

13.7 inches

Rear Rotors

14.2 inches

13.6 inches

Tires and Wheels

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For better traction and acceleration, the CLS has larger rear tires than the 6 Series Gran Turismo (275/35R19 vs. 245/45R19).

The CLS’ standard 245/40R19 front and 275/35R19 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) that provides a stiffer sidewall than the 6 Series Gran Turismo’s standard 45 series tires.

Suspension and Handling

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The CLS’ 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 6 Series Gran Turismo doesn’t offer drift compensation steering.

For better maneuverability, the CLS’ turning circle is 2.9 feet tighter than the 6 Series Gran Turismo’s (38.1 feet vs. 41 feet).

Chassis

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The Mercedes CLS may be more efficient, handle and accelerate better because it weighs about 200 to 350 pounds less than the BMW 6 Series Gran Turismo.

The CLS is 4.5 inches shorter than the 6 Series Gran Turismo, making the CLS easier to handle, maneuver and park in tight spaces.

The design of the Mercedes CLS amounts to more than styling. The CLS has an aerodynamic coefficient of drag of .27 Cd. That is lower than the 6 Series Gran Turismo (.29) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the CLS get better fuel mileage.

Cargo Capacity

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With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the CLS offers cargo security. The 6 Series Gran Turismo’s hatchback body style defeats cargo security.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than BMW. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 23% lower rating, BMW is ranked 11th.

Ergonomics

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A power rear sunshade is optional in the CLS to help block heat and glare for the rear passengers. The 6 Series Gran Turismo doesn’t offer a rear sunshade.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes CLS offers an optional wireless phone charging system (Qi) in the center console. The 6 Series Gran Turismo doesn’t offer wireless personal charging.

The CLS offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The 6 Series Gran Turismo doesn’t offer a house-current electrical outlet.

Model Availability

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The CLS is available in both rear-wheel drive and all-wheel drive configurations. The 6 Series Gran Turismo doesn’t offer a two-wheel drive configuration.

Economic Advantages

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Insurance will cost less for the CLS owner. The Complete Car Cost Guide estimates that insurance for the CLS will cost $720 to $1495 less than the 6 Series Gran Turismo over a five-year period.

Recommendations

© 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 2019/11/22

J.D. Power and Associates rated the CLS second among midsize premium cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The 6 Series Gran Turismo isn’t in the top three.

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