Certified Benz & Beemer Compares 2015 Infiniti Q50 VS 2015 Mercedes CLA-Class Near Scottsdale, AZ

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2015 Infiniti Q50

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2015 Mercedes CLA-Class

Safety Comparison

The Q50 Premium/Sport’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The CLA-Class doesn’t offer pre-crash pretensioners.

The Insurance Institute for Highway Safety tests front crash prevention systems. With a score of 6 points, IIHS rates the Forward Emergency Braking optional in the Q50 as “Superior.” The CLA-Class scores at most only 3 points, and is rated only “Basic.”

Over 200 people are killed each year when backed over by motor vehicles. The Q50 Premium/Sport offers optional Back-up Collision Intervention which use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The CLA-Class doesn’t offer backup collision prevention brakes.

The Q50 Premium/Sport offers an optional Around View ® Monitor to allow the driver to see objects all around the vehicle on a screen. The CLA-Class only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

To help make backing safer, the Q50 Premium/Sport’s optional 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 CLA-Class doesn’t offer a cross-path warning system.

Both the Q50 and the CLA-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.

For its top level performance in the IIHS moderate overlap frontal impact, side impact, rear impact, roof-crush crash tests, an “Acceptable” rating in the newer small overlap frontal crash test, and with its optional front crash prevention system, the Insurance Institute for Highway Safety grants the Q50 its highest rating: “Top Pick Plus” for 2015, a rating granted to only 46 vehicles tested by the IIHS. The CLA-Class has not been fully tested, yet.

Warranty Comparison

The Q50 comes with a full 4 year/60,000 mile basic warranty, which covers the entire car and includes 24 hour roadside assistance. The CLA-Class’ 4 year/50,000 mile basic warranty expires 10,000 miles sooner.

Infiniti’s powertrain warranty covers the Q50 2 years and 20,000 miles longer than Mercedes covers the CLA-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 CLA-Class ends after only 4 years or 50,000 miles.

The Q50’s corrosion warranty is 3 years and unlimited miles longer than the CLA-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 Q50’s reliability will be 18% better than the CLA-Class.

Engine Comparison

The Q50’s standard 3.7 DOHC V6 produces 120 more horsepower (328 vs. 208) and 11 lbs.-ft. more torque (269 vs. 258) than the CLA-Class’ 2.0 turbo 4 cyl. The Q50 Hybrid’s standard 3.5 DOHC V6 hybrid produces 152 more horsepower (360 vs. 208) than the CLA-Class’ 2.0 turbo 4 cyl.

As tested in Car and Driver the Infiniti Q50 V6 is faster than the Mercedes CLA250:



Zero to 60 MPH

4.9 sec

6.3 sec

Zero to 100 MPH

12.3 sec

16.7 sec

5 to 60 MPH Rolling Start

5.3 sec

7 sec

Quarter Mile

13.5 sec

14.9 sec

Speed in 1/4 Mile

104 MPH

95 MPH

Top Speed

144 MPH

133 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the Q50 Hybrid AWD gets better fuel mileage than the CLA250 4Matic:





28 city/35 hwy

24 city/33 hwy


Sport Auto

27 city/31 hwy


Regenerative brakes improve the Q50 Hybrid’s fuel efficiency by converting inertia back into energy instead of wasting it. The CLA-Class doesn’t offer a regenerative braking system.

The Q50 Hybrid’s standard fuel tank has 4.6 gallons more fuel capacity than the CLA-Class (17.8 vs. 13.2 gallons), for longer range between fill-ups. The Q50’s standard fuel tank has 6.8 gallons more fuel capacity than the CLA-Class (20 vs. 13.2 gallons).

Brakes and Stopping Comparison

For better stopping power the Q50S’ brake rotors are larger than those on the CLA-Class:



Front Rotors

14 inches

12.6 inches

Rear Rotors

13.8 inches

11.6 inches

The Q50’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the CLA-Class are solid, not vented.

The Q50 stops shorter than the CLA-Class:



70 to 0 MPH

156 feet

160 feet

Car and Driver

60 to 0 MPH

110 feet

114 feet

Motor Trend

60 to 0 MPH (Wet)

135 feet

137 feet

Consumer Reports

Tires and Wheels Comparison

For better traction, the Q50’s optional tires are larger than the largest tires available on the CLA-Class (F:245/40R19 & R:265/35R19 vs. 225/45R17).

The Q50’s optional 265/35R19 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the CLA-Class’ optional 40 series tires.

For better ride, handling and brake cooling the Q50 has standard 19-inch wheels. The CLA-Class’ largest wheels are only 18-inches.

The Q50 has a standard space-saver spare (not available on Hybrid) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the CLA-Class, 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 Comparison

The Q50’s optional 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 CLA-Class doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the Q50’s wheelbase is 5.9 inches longer than on the CLA-Class (112.2 inches vs. 106.3 inches).

The Q50’s front to rear weight distribution is more even (53% to 47%) than the CLA-Class’ (61% to 39%). This gives the Q50 more stable handling and braking.

The 3.7 Q50S handles at .95 G’s, while the CLA250 pulls only .90 G’s of cornering force in a Car and Driver skidpad test.

The 3.7 Q50S executes Motor Trend’s “Figure Eight” maneuver quicker than the CLA250 (25.8 seconds @ .71 average G’s vs. 26.4 seconds @ .69 average G’s).

Chassis Comparison

The Q50 offers available computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The CLA-Class doesn’t offer active noise cancellation.

Passenger Space Comparison

Because it has more passenger and cargo room, the Q50 is rated a Mid-size car by the EPA, while the CLA-Class is rated a Subcompact.

The Q50 has 23.9 cubic feet more passenger volume than the CLA-Class (101.9 vs. 78).

The Q50 has 2 inches more front headroom, 4.3 inches more front legroom, .7 inches more front shoulder room, 2.1 inches more rear headroom, 8 inches more rear legroom and 2.9 inches more rear shoulder room than the CLA-Class.

Cargo Capacity Comparison

The Q50 has a larger trunk than the CLA-Class (13.5 vs. 13.1 cubic feet).

With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the Q50 offers cargo security. The CLA-Class’ non-lockable folding seat defeats cargo security.

Ergonomics Comparison

Consumer Reports rated the Q50’s headlight performance “Good,” a higher rating than the CLA-Class’ headlights, which were rated “Fair.”

While driving with high beams on, sensitive light sensors available for the Q50 Premium/Sport detect other vehicles which could be blinded and automatically switch to low beams. The CLA-Class doesn’t offer automatic dimming high beams.

To help drivers see further while navigating curves, the Q50 Premium/Sport offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The CLA-Class doesn’t offer cornering lights.

On extremely cold Winter days, the Q50 AWD’s standard heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The CLA-Class doesn’t offer a heated steering wheel.

The Q50 has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The CLA-Class doesn’t offer a rear seat center armrest.

Recommendations Comparison

The Infiniti Q50 won the First for Safety award in Kiplinger’s 2014 car issue. The Mercedes CLA-Class didn't win any award.

The Infiniti Q50 outsold the Mercedes CLA-Class by 35% during 2014.

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