2020 Audi TT vs. 2020 Mercedes C-Class Cabriolet

Detailed Review, Specifications & Comparison

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Safety

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The TT has a standard Secondary Collision Brake Assist, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The C-Class Cabriolet doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.

To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the TT. But it costs extra on the C-Class Cabriolet.

Both the TT and the C-Class Cabriolet 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, daytime running lights, rearview cameras and available blind spot warning systems.

Warranty

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The TT’s corrosion warranty is 7 years longer than the C-Class Cabriolet’s (12 vs. 5 years).

Reliability

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A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the TT’s reliability 24 points higher than the C-Class Cabriolet.

J.D. Power and Associates’ 2019 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 8th in reliability, above the industry average. With 10 more problems per 100 vehicles, Mercedes is ranked 13th.

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.

Engine

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The TTS’ standard 2.0 turbo 4 cyl. produces 33 more horsepower (288 vs. 255) and 7 lbs.-ft. more torque (280 vs. 273) than the C-Class Cabriolet’s 2.0 turbo 4 cyl. The TT RS Coupe’s standard 2.5 turbo 5 cyl. produces 145 more horsepower (400 vs. 255) and 81 lbs.-ft. more torque (354 vs. 273) than the C-Class Cabriolet’s 2.0 turbo 4 cyl.

Fuel Economy and Range

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On the EPA test cycle the TT 45 TFSI Auto gets better fuel mileage than the C 300 Cabriolet 4MATIC (23 city/31 hwy vs. 21 city/29 hwy).

Environmental Friendliness

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The U.S. Environmental Protection Agency (EPA) certifies the Audi TT at emission levels ranging from “Ultra Low Emissions Vehicle” (ULEV) to “Super Ultra Low Emissions Vehicle” (SULEV). The Mercedes C-Class Cabriolet is only certified to “Ultra Low Emissions Vehicle” (ULEV) standards.

Transmission

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The TT 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 C-Class Cabriolet doesn’t offer an SMG or a conventional manual transmission.

The TT RS’ 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 C-Class Cabriolet doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the TT RS Coupe’s brake rotors are larger than those on the C-Class Cabriolet:

TT RS Coupe

C-Class Cabriolet

Front Rotors

14.6 inches

13 inches

Rear Rotors

12.2 inches

11.8 inches

The TT RS 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 C-Class Cabriolet doesn’t offer ceramic brake rotors.

The TT stops much shorter than the C-Class Cabriolet:

TT

C-Class Cabriolet

70 to 0 MPH

140 feet

158 feet

Car and Driver

Tires and Wheels

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For better traction, the TT has larger standard tires than the C-Class Cabriolet (245/40R18 vs. 225/45R18). The TTS/RS’ optional tires are larger than the largest tires available on the C-Class Cabriolet (255/30R20 vs. 225/45R18).

The TT 45 TSFI’s standard tires provide better handling because they have a lower 40 series profile (height to width ratio) that provides a stiffer sidewall than the C-Class Cabriolet’s standard 45 series front tires. The TTS/RS’ optional tires have a lower 30 series profile than the AMG C 43 Cabriolet’s optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the TTS/RS offers optional 20-inch wheels. The C-Class Cabriolet’s largest wheels are only 19-inches.

Suspension and Handling

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The TT offers an available driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The C-Class Cabriolet’s suspension doesn’t offer adjustable shock absorbers.

For better maneuverability, the TT’s turning circle is 2 feet tighter than the C 300 Cabriolet’s (34.8 feet vs. 36.8 feet). The TT RS Coupe’s turning circle is .8 feet tighter than the C 300 Cabriolet’s (36 feet vs. 36.8 feet).

Chassis

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The Audi TT may be more efficient, handle and accelerate better because it weighs about 600 to 650 pounds less than the Mercedes C-Class Cabriolet.

The TT is 1 foot, 7.5 inches shorter than the C-Class Cabriolet, making the TT easier to handle, maneuver and park in tight spaces.

Cargo Capacity

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The TT Roadster has a larger trunk with its top down than the C-Class Cabriolet with its top down (7.5 vs. 7 cubic feet).

Ergonomics

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Heated windshield washer nozzles are standard on the TT to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The C-Class Cabriolet doesn’t offer heated windshield washer nozzles.

To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Audi TT has a standard wireless phone charging system (Qi) in the center console. Wireless charging costs extra on the C-Class Cabriolet.

Economic Advantages

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Insurance will cost less for the TT owner. The Complete Car Cost Guide estimates that insurance for the TT will cost $2395 to $4365 less than the C-Class Cabriolet over a five-year period.

The TT will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the TT will retain 45.66% to 46.08% of its original price after five years, while the C-Class Cabriolet only retains 34.77%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi TT will be $10495 to $12383 less than for the Mercedes C-Class Cabriolet.

Recommendations

© 1999 - 2019 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 2019/12/15

Consumer Reports® recommends the Audi TT, based on reliability, safety and performance.

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

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