2019 Mercedes CLS vs. 2019 Infiniti Q70

Detailed Review, Specifications & Comparison

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Safety

The CLS’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Q70 doesn’t offer a driver alert monitor.

Both the CLS and the Q70 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, lane departure warning systems, around view monitors and rear cross-path warning.

Warranty

There are over 79 percent more Mercedes dealers than there are Infiniti dealers, which makes it much easier should you ever need service under the CLS’ warranty.

Engine

The CLS 450’s standard 3.0 turbo 6 cyl. hybrid produces 32 more horsepower (362 vs. 330) and 99 lbs.-ft. more torque (369 vs. 270) than the Q70 3.7 LUXE’s standard 3.7 DOHC V6. The AMG CLS 53’s standard 3.0 turbo 6 cyl. hybrid produces 9 more horsepower (429 vs. 420) than the Q70 5.6 LUXE’s standard 5.6 DOHC V8.

As tested in Car and Driver the CLS 450 is faster than the Q70 3.7:

 

CLS

Q70

Zero to 60 MPH

4.7 sec

5.6 sec

Zero to 100 MPH

11.5 sec

13.9 sec

5 to 60 MPH Rolling Start

5.6 sec

5.8 sec

Quarter Mile

13.2 sec

14.1 sec

Speed in 1/4 Mile

107 MPH

101 MPH

Fuel Economy and Range

On the EPA test cycle the CLS gets better fuel mileage than the Q70:

 

 

CLS

Q70

 

RWD

450/Auto

24 city/31 hwy

18 city/25 hwy

3.7/Auto

 

 

n/a

16 city/24 hwy

5.6/Auto

AWD

450/Auto

23 city/30 hwy

18 city/24 hwy

3.7/Auto

 

AMG 53/Auto

21 city/27 hwy

16 city/23 hwy

5.6/Auto

Regenerative brakes improve the CLS’ fuel efficiency by converting inertia back into energy instead of wasting it. The Q70 doesn’t offer a regenerative braking system.

In heavy traffic or at stoplights the CLS’ engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Q70 doesn’t offer an automatic engine start/stop system.

The CLS has 1.1 gallons more fuel capacity than the Q70 (21.1 vs. 20 gallons), for longer range between fill-ups.

Transmission

A nine-speed automatic is available on the Mercedes CLS, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the Q70.

Brakes and Stopping

For better stopping power the CLS’ brake rotors are larger than those on the Q70:

 

CLS

Q70

Q70 Sport

Front Rotors

14.2 inches

12.6 inches

14 inches

Rear Rotors

14.2 inches

12.1 inches

13.8 inches

The CLS stops shorter than the Q70:

 

CLS

Q70

 

70 to 0 MPH

167 feet

171 feet

Car and Driver

Tires and Wheels

For better traction and acceleration, the CLS has larger rear tires than the Q70 (275/35R19 vs. 245/40R20).

The CLS’ 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 Q70’s standard 50 series tires. The CLS’ tires are lower profile than the Q70’s optional 40 series tires.

For better ride, handling and brake cooling the CLS 450 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the Q70.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the CLS can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Q70 doesn’t offer run-flat tires.

Suspension and Handling

The CLS offers an available driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The Q70’s suspension doesn’t offer adjustable shock absorbers.

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 Q70 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the CLS’ wheelbase is 1.5 inches longer than on the Q70 (115.7 inches vs. 114.2 inches).

For better handling and stability, the track (width between the wheels) on the CLS is 1.7 inches wider in the front and 2.4 inches wider in the rear than the average track on the Q70.

The CLS 450 4MATIC handles at .93 G’s, while the Q70 3.7 LUXE pulls only .82 G’s of cornering force in a Car and Driver skidpad test.

Cargo Capacity

The CLS’ standard rear seats fold to accommodate long and bulky cargo. The Q70 doesn’t offer folding rear seats, only a ski pass-through.

To make loading and unloading groceries and cargo easier when your hands are full, the CLS’ power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The Q70 doesn’t offer a power or hands-free opening trunk.

Ergonomics

The CLS 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 Q70 doesn’t offer a remote starting system.

Unlike the driver-only memory system in the Q70, the CLS has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The CLS 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 Q70 doesn’t offer a heads-up display.

The power windows standard on both the CLS and the Q70 have locks to prevent small children from operating them. When the lock on the CLS is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The Q70 prevents the driver from operating the other windows just as it does the other passengers.

The CLS’ front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Q70’s rear power window switches have to be held the entire time to open or close them fully.

While driving with high beams on, sensitive light sensors available for the CLS detect other vehicles which could be blinded and automatically switch to low beams. The Q70 doesn’t offer automatic dimming high beams.

Standard smartphone integration for the CLS allows the driver and passengers access to select programs on their smartphones, including reading text messages aloud, playing internet radio stations, searching the internet and other connected activities without taking their eyes off the road or their hands from the wheel. The Q70 doesn’t offer factory integrated smartphone program access.

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 Q70 doesn’t offer a house-current electrical outlet.

The CLS’ optional Active Parking Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Q70 doesn’t offer an automated parking system.

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

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