Compare the2023 Mercedes AMG C-Class SedanVS 2023 Audi S4

Over 200 people are killed each year when backed over by motor vehicles. The AMG C-Class Sedan offers an optional Maneuvering Brake Function that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The S4 doesn’t offer backup collision prevention brakes.

The AMG C-Class Sedan has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. A system to reveal vehicles in the S4’s blind spot costs extra.

To help make backing out of a parking space safer, the AMG C-Class Sedan has standard Rear Cross-Traffic Alert and Active Brake Assist automatically engages the brakes to help avoid a collision. Audi charges extra for rear cross-path warning on the S4.

The AMG C-Class Sedan’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 S4 doesn’t offer a driver alert monitor.

Both the AMG C-Class Sedan and the S4 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, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights and rearview cameras.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, with its optional vehicle-to-vehicle front crash prevention system, with its optional vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the AMG C-Class Sedan its highest rating: “Top Safety Pick Plus” for 2022, a rating granted to only 126 vehicles tested by the IIHS. The S4 has not been tested, yet.

There are over 25 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the AMG C-Class Sedan’s warranty.

J.D. Power and Associates’ 2022 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Audi vehicles. With 50 fewer problems per 100 vehicles, JD Power ranks Mercedes higher than Audi.

J.D. Power and Associates’ 2022 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Audi With 37 fewer problems per 100 vehicles in the first three years of ownership, J.D. Power ranks Mercedes higher than Audi.

The AMG C-Class Sedan’s 2.0 turbo 4-cylinder hybrid produces 53 more horsepower (402 vs. 349) than the S4’s 3.0 turbo V6.

Regenerative brakes improve the AMG C-Class Sedan’s fuel efficiency by converting inertia back into energy instead of wasting it. The S4 doesn’t offer a regenerative braking system.

The AMG C-Class Sedan has 2.1 gallons more fuel capacity than the S4 (17.4 vs. 15.3 gallons), for longer range between fill-ups.

A nine-speed automatic (SMG) is standard on the Mercedes AMG C-Class Sedan, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the S4.

The AMG C-Class Sedan offers a standard 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 S4 doesn’t offer an SMG or a conventional manual transmission.

For better stopping power the AMG C-Class Sedan’s front brake rotors are larger than those on the S4:

For better ride, handling and brake cooling the AMG C-Class Sedan offers optional 20-inch wheels. The S4’s largest wheels are only 19-inches.

Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the AMG C-Class Sedan can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The S4 doesn’t offer run-flat tires.

The AMG C-Class Sedan’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 S4 doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the AMG C-Class Sedan’s wheelbase is 1.8 inches longer than on the S4 (112.8 inches vs. 111 inches).

For better handling and stability, the track (width between the wheels) on the AMG C-Class Sedan is .7 inches wider in the front and 1.9 inches wider in the rear than on the S4.

The AMG C-Class Sedan has 3.7 inches more front headroom, .4 inches more front legroom, .4 inches more front shoulder room, .2 inches more rear headroom, .3 inches more rear legroom and 1.1 inches more rear shoulder room than the S4.

The AMG C-Class Sedan has a larger trunk than the S4 (12.6 vs. 12 cubic feet).

Pressing a switch automatically lowers the AMG C-Class Sedan’s rear seats, to make changing between passengers and cargo easier. The S4 doesn’t offer automatic folding seats.

To make loading and unloading groceries and cargo easier, especially for short adults, the AMG C-Class Sedan 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 S4 doesn’t offer a power trunk, so its trunk has to be closed manually.

The AMG C-Class Sedan 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 S4 doesn’t offer a remote starting system.

Unlike the driver-only memory seat and mirrors optional at extra cost in the S4, the AMG C-Class Sedan 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 Sedan’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The S4 doesn’t offer an easy entry system.

Heated windshield washer fluid is standard on the AMG C-Class Sedan to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The S4 doesn’t offer heated windshield washer fluid. Its standard heated washer nozzles will defrost the washer fluid but not the windshield.

The AMG C-Class Sedan’s Active Parking Assist can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. The S4 Prestige’s automatic parking system requires operating the brakes and transmission to safely park.

The Mercedes AMG C-Class comes in coupe, convertible and sedan bodystyles; the Audi S4 isn’t available as a coupe or convertible.

The Mercedes C-Class outsold the Audi A4/S4 by 72% during 2022.