2019 Audi S5 Sportback vs. 2019 Mercedes C-Class Sedan

Detailed Review, Specifications & Comparison

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Safety

The S5 Sportback has standard Secondary Collision Brake Assist, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The C-Class Sedan 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 provide maximum traction and stability on all roads, All-Wheel Drive is standard on the S5 Sportback. But it costs extra on the C-Class Sedan.

When descending a steep, off-road slope, the S5 Sportback’s standard Hill Descent Control allows you to creep down safely. The C-Class Sedan doesn’t offer Hill Descent Control.

Both the S5 Sportback and the C-Class Sedan have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height-adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

Warranty

The S5 Sportback’s corrosion warranty is 7 years longer than the C-Class Sedan’s (12 vs. 5 years).

Reliability

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Audi vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Audi 13th in reliability, above the industry average. With 6 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that Audi vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Audi 10 places higher in reliability than Mercedes.

Engine

The S5 Sportback’s 3.0 turbo V6 produces 94 more horsepower (349 vs. 255) and 96 lbs.-ft. more torque (369 vs. 273) than the C 300 Sedan’s standard 2.0 turbo 4 cyl.

Fuel Economy and Range

Regenerative brakes improve the S5 Sportback’s fuel efficiency by converting inertia back into energy instead of wasting it. The C-Class Sedan doesn’t offer a regenerative braking system.

Brakes and Stopping

For better stopping power the S5 Sportback’s standard brake rotors are larger than those on the C-Class Sedan:

 

S5 Sportback

C-Class Sedan

Front Rotors

13.8 inches

13 inches

Rear Rotors

13 inches

11.8 inches

The S5 Sportback stops shorter than the C-Class Sedan:

 

S5 Sportback

C-Class Sedan

 

70 to 0 MPH

158 feet

160 feet

Car and Driver

60 to 0 MPH

105 feet

108 feet

Motor Trend

Tires and Wheels

For better traction, the S5 Sportback has larger standard tires than the C-Class Sedan (245/40R18 vs. 225/50R17). The S5 Sportback’s optional tires are larger than the largest tires available on the C-Class Sedan (265/30R20 vs. 225/40R19).

The S5 Sportback’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the C-Class Sedan’s standard 50 series tires. The S5 Sportback’s optional tires have a lower 30 series profile than the C-Class Sedan’s optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the S5 Sportback has standard 18-inch wheels. Smaller 17-inch wheels are standard on the C-Class Sedan. The S5 Sportback’s optional 20-inch wheels are larger than the 19-inch wheels optional on the C-Class Sedan.

Suspension and Handling

The S5 Sportback Prestige handles at .93 G’s, while the C 300 Sedan 4MATIC pulls only .87 G’s of cornering force in a Motor Trend skidpad test.

The S5 Sportback Prestige executes Motor Trend’s “Figure Eight” maneuver 1.3 seconds quicker than the C 300 Sedan 4MATIC (25 seconds @ .76 average G’s vs. 26.3 seconds @ .7 average G’s).

Chassis

The design of the Audi S5 Sportback amounts to more than styling. The S5 Sportback has an aerodynamic coefficient of drag of .29 Cd. That is lower than the C-Class Sedan (.3 to .32) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the S5 Sportback get better fuel mileage.

Passenger Space

The S5 Sportback has 2.3 inches more front headroom and .4 inches more front shoulder room than the C-Class Sedan.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than Mercedes. J.D. Power ranks Audi third in service department satisfaction. With a 3% lower rating, Mercedes is ranked 6th.

Ergonomics

Heated windshield washer nozzles are standard on the S5 Sportback to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The C-Class Sedan doesn’t offer heated windshield washer nozzles.

The S5 Sportback has standard heated front seats. Heated front seats cost extra on the C-Class Sedan. The S5 Sportback also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the C-Class Sedan.

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

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