2019 Audi RS 5 vs. 2018 Mercedes AMG C 63 Coupe

Detailed Review, Specifications & Comparison

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The RS 5’s standard pretensioning seatbelts also sense rear collisions and remove slack from the seatbelts to help protect the occupants from whiplash and other injuries. The AMG C 63 Coupe doesn’t offer a whiplash protection system.

The RS 5 has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The AMG C 63 Coupe doesn’t offer all-wheel drive.

To help make backing safer, the RS 5’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 AMG C 63 Coupe doesn’t offer a cross-path warning system.

Both the RS 5 and the AMG C 63 Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, blind spot warning systems, rearview cameras, available lane departure warning systems and around view monitors.


The RS 5’s corrosion warranty is 7 years longer than the AMG C 63 Coupe’s (12 vs. 5 years).


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.

Fuel Economy and Range

Regenerative brakes improve the RS 5’s fuel efficiency by converting inertia back into energy instead of wasting it. The AMG C 63 Coupe doesn’t offer a regenerative braking system.

Transmission and Drivetrain

An eight-speed automatic is standard on the Audi RS 5, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the AMG C 63 Coupe.

All-wheel drive, available in the RS 5, provides the best traction for acceleration in wet, dry, and icy conditions. In corners, all-wheel drive allows both outside wheels to provide power, balancing the car. This allows for better handling. The Mercedes AMG C 63 Coupe is not available with all-wheel drive.

Brakes and Stopping

For better stopping power the RS 5’s standard front brake rotors are larger than those on the AMG C 63 Coupe:


RS 5

AMG C 63 Coupe

Front Rotors

14.8 inches

14.2 inches

Tires and Wheels

For better traction, the RS 5 has larger standard tires than the AMG C 63 Coupe (265/35R19 vs. 255/40R18). The RS 5’s optional tires are larger than the largest tires available on the AMG C 63 Coupe (275/30R20 vs. 255/40R18).

The RS 5’s standard tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the AMG C 63 Coupe’s standard 40 series front tires. The RS 5’s optional tires have a lower 30 series profile than the AMG C 63 Coupe’s optional 35 series front tires.

For better ride, handling and brake cooling the RS 5 has standard 19-inch wheels. Smaller 18-inch wheels are standard on the AMG C 63 Coupe. The RS 5’s optional 20-inch wheels are larger than the 19-inch front wheels and 20-inch rear wheels optional on the AMG C 63 S Coupe.


The design of the Audi RS 5 amounts to more than styling. The RS 5 has an aerodynamic coefficient of drag of .32 Cd. That is lower than the AMG C 63 Coupe (.35). A more efficient exterior helps the RS 5 go faster and keeps the interior quieter. It also helps the RS 5 get better fuel mileage.

Passenger Space

The RS 5 has 4.7 cubic feet more passenger volume than the AMG C 63 Coupe (84 vs. 79.3).

The RS 5 has .2 inches more front headroom, .3 inches more front shoulder room, .5 inches more rear headroom, .7 inches more rear legroom and 3.6 inches more rear shoulder room than the AMG C 63 Coupe.

Cargo Capacity

The RS 5 has a much larger trunk than the AMG C 63 Coupe (11.6 vs. 10.5 cubic feet).

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.


Heated windshield washer nozzles are standard on the RS 5 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The AMG C 63 Coupe doesn’t offer heated windshield washer nozzles.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The RS 5 has standard headlight washers to keep headlight output high. The AMG C 63 Coupe doesn’t offer headlight washers.

On extremely cold winter days, the RS 5’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The AMG C 63 Coupe doesn’t offer a heated steering wheel.

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

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