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Over 200 people are killed each year when backed over by motor vehicles. The AMG GT 4-Door has a standard Rear Cross Traffic Brake that use rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The S6 doesn’t offer backup collision prevention brakes.
The AMG GT 4-Door’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 S6 doesn’t offer a driver alert monitor.
The AMG GT 4-Door has standard Mercedes-Benz Emergency Call, which uses a global positioning satellite (GPS) receiver and a cellular system to remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The S6 doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.
Both the AMG GT 4-Door and the S6 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, daytime running lights, blind spot warning systems, rearview cameras, rear cross-path warning, available lane departure warning systems and around view monitors.
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 GT 4-Door’s warranty.
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 GT 63’s standard 4.0 turbo V8 produces 127 more horsepower (577 vs. 450) and 184 lbs.-ft. more torque (590 vs. 406) than the S6’s 4.0 turbo V8. The AMG GT 63 S’ standard 4.0 turbo V8 produces 180 more horsepower (630 vs. 450) and 258 lbs.-ft. more torque (664 vs. 406) than the S6’s 4.0 turbo V8.
On the EPA test cycle the AMG GT 53 gets better fuel mileage than the S6 (19 city/24 hwy vs. 16 city/24 hwy).
Regenerative brakes improve the AMG GT 4-Door 53’s fuel efficiency by converting inertia back into energy instead of wasting it. The S6 doesn’t offer a regenerative braking system.
In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes AMG GT 4-Door higher (5 to 6 out of 10) than the Audi S6 (3). This means the AMG GT 4-Door produces up to 23.4 pounds less smog-producing pollutants than the S6 every 15,000 miles.
A nine-speed automatic is available on the Mercedes AMG GT 4-Door, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the S6.
The AMG GT 4-Door offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The S6 doesn’t offer ceramic brake rotors.
For better traction, the AMG GT 63 S’ tires are larger than the largest tires available on the S6 (F:265/40R20 & R:295/35R20 vs. 255/35R20).
For better ride, handling and brake cooling the AMG GT 4-Door offers optional 21-inch wheels. The S6’s largest wheels are only 20-inches.
The AMG GT 4-Door’s drift compensation steering can automatically compensate for road conditions that would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The S6 doesn’t offer drift compensation steering.
For a smoother ride and more stable handling, the AMG GT 4-Door’s wheelbase is 1.4 inches longer than on the S6 (116.2 inches vs. 114.8 inches).
For better handling and stability, the average track (width between the wheels) on the AMG GT 4-Door is 2.2 inches wider in the front and 2.2 inches wider in the rear than the track on the S6.
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 GT 4-Door 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 S6 doesn’t offer a remote starting system.
If the windows are left open on the AMG GT 4-Door 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 S6 can’t use the remote to operate the windows.
To help drivers see further while navigating curves, the AMG GT 4-Door has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The S6 doesn’t offer cornering lights.
When the AMG GT 4-Door is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The S6’s mirror doesn’t automatically adjust for backing.
The AMG GT 4-Door 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 S6 doesn’t offer a house-current electrical outlet.
The AMG GT 4-Door’s Active Parking Assist can parallel park by itself, with the driver only controlling speed with the brake pedal. The S6 doesn’t offer an automated parking system.
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