2020 Mercedes C-Class Coupe vs. 2020 Audi TT

Detailed Review, Specifications & Comparison

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Safety

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The C-Class Coupe’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The TT doesn’t offer pre-crash pretensioners.

The C-Class Coupe has standard Active Brake Assist, which use forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The TT doesn't offer collision warning or crash mitigation brakes.

The C-Class Coupe’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The TT doesn’t offer a lane departure warning system.

The C-Class Coupe offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The TT only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

To help make backing safer, the C-Class Coupe’s optional cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The TT doesn’t offer a cross-path warning system.

The 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 TT doesn’t offer a driver alert monitor.

Both the C-Class Coupe and the TT 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 all wheel drive.

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 C-Class Coupe’s warranty.

Reliability

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To reliably power the ignition and other systems and to recharge the battery, the C-Class Coupe has a standard 150-amp alternator. The TT’s 140-amp alternator 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.

Engine

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The C-Class Coupe’s 2.0 turbo 4-cylinder produces 27 more horsepower (255 vs. 228) and 15 lbs.-ft. more torque (273 vs. 258) than the TT 45 TFSI’s standard 2.0 turbo 4-cylinder.

Fuel Economy and Range

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The C-Class Coupe has 2.9 gallons more fuel capacity than the TT (17.4 vs. 14.5 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic is standard on the Mercedes C-Class Coupe, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the TT.

Brakes and Stopping

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

C-Class

TT

Front Rotors

13 inches

12.3 inches

The C-Class Coupe’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs standard on the TT 45 TSFI are solid, not vented.

Tires and Wheels

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Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the 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 TT doesn’t offer run-flat tires.

Suspension and Handling

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The C-Class Coupe has standard front and rear gas-charged shocks for better control over choppy roads. The TT’s suspension doesn’t offer rear gas-charged shocks.

The 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 TT doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the C-Class Coupe’s wheelbase is 13.2 inches longer than on the TT (111.8 inches vs. 98.6 inches).

The C-Class Coupe’s front to rear weight distribution is more even (53.8% to 46.2%) than the TT’s (60.7% to 39.3%). This gives the C-Class Coupe more stable handling and braking.

Passenger Space

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The C-Class Coupe has 5.3 cubic feet more passenger volume than the TT (79.3 vs. 74).

The C-Class Coupe has 1.7 inches more front headroom, .9 inches more front legroom, 1.2 inches more front shoulder room, 1.8 inches more rear headroom, 3.1 inches more rear legroom and 3.8 inches more rear shoulder room than the TT Coupe.

Cargo Capacity

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A low lift-over trunk design makes loading and unloading the C-Class Coupe easier. The C-Class Coupe’s trunk lift-over height is 25.3 inches, while the TT Coupe’s liftover is 32.5 inches.

With its coupe body style, valet key, locking rear seatbacks and remote trunk release lockout, the C-Class offers cargo security. The TT’s non-lockable folding seat and non-lockable remote release defeat cargo security.

To make loading and unloading groceries and cargo easier when your hands are full, the C-Class Coupe’s power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The TT doesn’t offer a power or hands-free opening trunk.

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 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 TT doesn’t offer a remote starting system.

When three different drivers share the C-Class Coupe, the memory system makes it convenient for all three. Each setting activates different, customized memories for the driver’s seat (memory seat optional for the front passenger), steering wheel position and outside mirror angle. The TT doesn’t offer a memory system.

The 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 TT doesn’t offer an easy entry system.

The C-Class Coupe offers an optional heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The TT doesn’t offer a heads-up display.

While driving with high beams on, sensitive light sensors available for the C-Class Coupe detect other vehicles which could be blinded and automatically switch to low beams. The TT doesn’t offer automatic dimming high beams.

The TT’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The C-Class Coupe’s optional adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the C-Class Coupe has standard extendable sun visors. The TT doesn’t offer extendable visors.

Optional air-conditioned seats in the C-Class Coupe keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The TT doesn’t offer air-conditioned seats.

On extremely cold winter days, the C-Class Coupe’s optional heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The TT doesn’t offer a heated steering wheel.

The C-Class Coupe’s standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. The TT doesn’t offer dual zone air conditioning.

For greater rear passenger comfort, the C-Class Coupe has standard rear a/c vents to keep rear occupants more comfortable. The TT doesn’t offer rear vents.

To keep a safe, consistent following distance, the C-Class Coupe offers an optional Active Distance Assist Distronic, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The TT doesn’t offer an adaptive cruise control.

The C-Class Coupe’s optional Active Parking Assist can parallel park or back into a parking spot by itself, stopping and changing direction automatically. The TT doesn’t offer an automated parking system.

Model Availability

© 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 2020/11/30

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

The C-Class Coupe is available in both rear-wheel drive and all-wheel drive configurations. The TT 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 2020/11/30

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

J.D. Power and Associates rated the 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 TT isn’t in the top three in its category.

The Mercedes C-Class outsold the Audi TT by over 50 to one during the 2019 model year.

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