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For enhanced safety, the front seat shoulder belts of the Mercedes AMG E-Class Coupe are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Audi S5 doesn’t offer height-adjustable seat belts.
The AMG E-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 S5 doesn’t offer a driver alert monitor.
Both the AMG E-Class Coupe and the S5 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, around view monitors and rear cross-path warning.
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 E-Class Coupe’s warranty.
To reliably power the ignition and other systems and to recharge the battery, the AMG E-Class Coupe has a standard 180-amp alternator. The S5’s standard 110-amp alternator and largest (optional) 150-amp alternator aren’t as powerful.
To reliably start during all conditions and help handle large electrical loads, the AMG E-Class Coupe has a standard 850-amp battery. The S5’s 420-amp battery isn’t as powerful.
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.
The AMG E-Class Coupe’s 3.0 turbo 6-cylinder hybrid produces 80 more horsepower (429 vs. 349) and 15 lbs.-ft. more torque (384 vs. 369) than the S5’s 3.0 turbo V6.
On the EPA test cycle the AMG E-Class Coupe gets better fuel mileage than the S5 (21 city/28 hwy vs. 20 city/27 hwy).
The AMG E-Class Coupe has 2.1 gallons more fuel capacity than the S5 (17.4 vs. 15.3 gallons), for longer range between fill-ups.
A nine-speed automatic is standard on the Mercedes AMG E-Class Coupe, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the S5.
For better stopping power the AMG E-Class Coupe’s brake rotors are larger than those on the S5:
AMG E-Class Coupe
For better traction and acceleration, the AMG E-Class Coupe has larger rear tires than the S5 (275/35R19 vs. 245/40R18). The AMG E-Class Coupe’s optional rear tires are larger than the largest rear tires available on the S5 (275/35R19 vs. 265/30R20).
The AMG E-Class Coupe’s standard 275/35R19 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the S5’s standard 40 series tires.
For better ride, handling and brake cooling the AMG E-Class Coupe has standard 19-inch wheels. Smaller 18-inch wheels are standard on the S5.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the AMG E-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 S5 doesn’t offer run-flat tires.
The front and rear suspension of the AMG E-Class Coupe uses air springs for a smoother, controlled ride than the S5, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.
The AMG E-Class Coupe has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The AMG E-Class Coupe’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The S5 doesn’t offer a load leveling suspension.
The AMG E-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 S5 doesn’t offer drift compensation steering.
For a smoother ride and more stable handling, the AMG E-Class Coupe’s wheelbase is 4.3 inches longer than on the S5 (113.1 inches vs. 108.8 inches).
For better handling and stability, the track (width between the wheels) on the AMG E-Class Coupe is 1.6 inches wider in the front and 1.1 inches wider in the rear than on the S5.
The AMG E-Class Coupe has 8 cubic feet more passenger volume than the S5 (89 vs. 81).
The AMG E-Class Coupe has .4 inches more front headroom, .5 inches more front legroom, .8 inches more front shoulder room, .3 inches more rear headroom and 1.4 inches more rear legroom than the S5 Coupe.
To make loading and unloading groceries and cargo easier, especially for short adults, the AMG E-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 S5 doesn’t offer a power trunk, so its trunk has to be closed manually.
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.
The AMG E-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 S5 doesn’t offer a remote starting system.
Unlike the driver-only memory system optional at extra cost in the S5, the AMG E-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 E-Class Coupe’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The S5 doesn’t offer an easy entry system.
The AMG E-Class Coupe’s standard power windows have a locking feature to keep children in the rear seat from operating them, but the driver can still raise and lower all of them with the lock engaged. Audi does not offer a locking feature on the S5’s standard power windows.
The AMG E-Class Coupe’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The S5’s cruise control switches are unlit, making them difficult to find at night and operate safely.
Heated windshield washer fluid is standard on the AMG E-Class Coupe to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The S5 doesn’t offer heated windshield washer fluid. Its standard heated washer nozzles will defrost the washer fluid but not the windshield.
To help drivers avoid possible obstacles, the AMG E-Class Coupe has standard cornering lights to illuminate around corners when the turn signals are activated. The S5 doesn’t offer cornering lights. The AMG E-Class Coupe also offers optional adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle.
A power rear sunshade is optional in the AMG E-Class Coupe to help block heat and glare for the rear passengers. The S5 doesn’t offer a rear sunshade.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes AMG E-Class has a standard wireless phone charging system (Qi) in the center console. Only the S5 Premium Plus/Prestige offers wireless charging.
The AMG E-Class Coupe offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The S5 doesn’t offer a house-current electrical outlet.
The AMG E-Class Coupe’s optional Active Parking Assist can parallel park by itself, starting, stopping and changing direction automatically. The S5 Prestige’s automatic parking system requires operating the brakes and transmission to safely park.
The Mercedes AMG E-Class comes in coupe, convertible, sedan and station wagon bodystyles; the Audi S5 isn’t available as a station wagon.
Insurance will cost less for the AMG E-Class Coupe owner. The Complete Car Cost Guide estimates that insurance for the AMG E-Class Coupe will cost $370 to $2880 less than the S5 over a five-year period.
The E 450/E 53 was chosen as one of Car and Driver’s “Top Ten” for 2 of the last 3 years. The S5 has never been a Car and Driver “Top Ten” pick.
The Mercedes E-Class/CLS outsold the Audi A5/S5/RS 5 by 74% during 2019.
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