2020 Mercedes AMG C-Class Coupe vs. 2019 Audi RS 5

Detailed Review, Specifications & Comparison

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Safety

© 1999 - 2020 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 2020/02/18

Using vehicle speed sensors, smart airbags in the AMG C-Class Coupe deploy with different levels of force or don’t deploy at all to help better protect passengers of all sizes in different collisions. The AMG C-Class Coupe’s side airbags will shut off if a child is leaning against the door. The RS 5’s airbags don’t have smart features and will always deploy full force.

The AMG C-Class Coupe’s 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 RS 5 doesn’t offer a driver alert monitor.

Both the AMG C-Class Coupe and the RS 5 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, around view monitors and rear cross-path warning.

Warranty

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There are over 26 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the AMG C-Class Coupe’s warranty.

Reliability

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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 Audi vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 12 more problems per 100 vehicles, Audi is ranked 22nd.

Engine

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The AMG C 63 Coupe’s standard 4.0 turbo V8 produces 25 more horsepower (469 vs. 444) and 36 lbs.-ft. more torque (479 vs. 443) than the RS 5’s 2.9 turbo V6. The AMG C 63 S Coupe’s standard 4.0 turbo V8 produces 59 more horsepower (503 vs. 444) and 73 lbs.-ft. more torque (516 vs. 443) than the RS 5’s 2.9 turbo V6.

Fuel Economy and Range

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On the EPA test cycle the AMG C 43 Coupe 4MATIC gets better fuel mileage than the RS 5 (19 city/27 hwy vs. 18 city/27 hwy).

In heavy traffic or at stoplights the AMG C-Class Coupe’s 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 RS 5 doesn’t offer an automatic engine start/stop system.

The AMG C-Class Coupe has 2.1 gallons more fuel capacity than the RS 5 (17.4 vs. 15.3 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic (SMG) is standard on the Mercedes AMG C-Class Coupe, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the RS 5.

The AMG C-Class Coupe offers an available sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The RS 5 doesn’t offer an SMG or a conventional manual transmission.

The AMG C-Class Coupe V8’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The RS 5 doesn’t offer launch control.

Tires and Wheels

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Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the AMG C-Class Coupe can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The RS 5 doesn’t offer run-flat tires.

Suspension and Handling

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The AMG C-Class Coupe’s 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 RS 5 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG C-Class Coupe’s wheelbase is 2.9 inches longer than on the RS 5 (111.8 inches vs. 108.9 inches).

For better maneuverability, the AMG C 63 Coupe’s turning circle is 1.3 feet tighter than the RS 5’s (37.1 feet vs. 38.4 feet).

Cargo Capacity

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To make loading and unloading groceries and cargo easier, especially for short adults, the AMG C-Class Coupe has a standard power trunk, which opens and closes automatically by pressing a button or just by kicking your foot under the back bumper, completely leaving your hands free. The RS 5 doesn’t offer a power trunk, so its trunk has to be closed manually.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than Audi. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 13% lower rating, Audi is ranked 8th.

Ergonomics

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The AMG C-Class Coupe 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 RS 5 doesn’t offer a remote starting system.

Unlike the driver-only memory system in the RS 5, the AMG C-Class Coupe 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 AMG C-Class Coupe’s standard easy entry system raises the steering wheel and glides the driver’s seat back, making it easier for the driver to get in and out. The RS 5 doesn’t offer an easy entry system.

If the windows are left open on the AMG C-Class Coupe the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the RS 5 can’t use the remote to operate the windows.

To help drivers see further while navigating curves, the AMG C-Class Coupe offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The RS 5 doesn’t offer cornering lights.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes AMG C-Class offers an optional wireless phone charging system (Qi) in the center console. The RS 5 doesn’t offer wireless personal charging.

The AMG C-Class Coupe’s optional Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The RS 5’s automatic parking system requires operating the brakes and transmission to safely park.

Model Availability

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The Mercedes AMG C-Class comes in coupe, convertible and sedan bodystyles; the Audi RS 5 isn’t available as a convertible or sedan.

The AMG C-Class Coupe is available in both rear-wheel drive and all-wheel drive configurations. The RS 5 doesn’t offer a two-wheel drive configuration.

Recommendations

© 1999 - 2020 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 2020/02/18

Consumer Reports® recommends the Mercedes AMG C-Class Coupe, based on reliability, safety and performance.

J.D. Power and Associates rated the AMG C-Class Coupe first among compact premium cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The RS 5 isn’t in the top three.

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

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