2018 Mercedes-Benz C-Class Convertible

2018 Mercedes-Benz C-Class
2018 Mercedes-Benz C-Class


  • Interior is impeccably crafted
  • Many available cutting-edge features
  • Exterior styling turns heads everywhere
  • Multiple high-horsepower powertrains available


  • Clumsy touchpad infotainment interface
  • Stiff standard suspension
Mercedes-Benz C-Class years

Which C-Class does Edmunds recommend?

While we certainly lust after the AMG C63 S with its righteously powerful 4.0-liter turbo V8, it's nearly double the price of the base C-Class. (And, really, how often do you get to use 503 horsepower?) As such, going with a standard C300 is a fine choice. It has decent power, a simple yet elegant interior, and lots of available options via packages or stand-alone items. Not sold? OK, for a good middle ground with more power and equipment, but without the C63's high entry cost, check out the AMG C43.

Edmunds' Expert Review

Overall rating

7.6 / 10

There was a time when you could call the Mercedes-Benz C-Class an entry-level luxury vehicle. But to do so for 2018 would be a bit of a disservice. First of all, the CLA-Class is technically Mercedes' entry-level sedan now. But more importantly, the C-Class is more impressive than the words "entry-level" would lead you to believe. It comes with an impeccably built interior, high-quality materials inside and out, upgrading and customizing options galore, and a variety of engine choices.

As for those engines, there's a lot to chose from if you want something other than the C300's turbocharged four-cylinder engine. For better fuel economy, check out the C350e. This plug-in hybrid version of the C-Class offers a modicum of all-electric driving range, an increase in power and the best fuel economy of the C-Class range. If autobahn-worthy speeds are more your thing, there's a turbocharged V6 in the AMG C43 and the turbocharged V8 in the AMG C63, both of which are bona fide sport sedans.

Of course, there are other entry-level luxury sedans, coupes and convertibles that may catch your eye. But it would be a glaring omission if the 2018 Mercedes-Benz C-Class didn't end up on your short list.

Notably, we picked the 2018 Mercedes-Benz C-Class AMG C 63 as one of Edmunds' Best Sports Sedans for this year.

2018 Mercedes-Benz C-Class configurations

The 2018 Mercedes-Benz C-Class comes in three body styles: sedan, coupe and convertible (Cabriolet). The C-Class sedan, coupe and convertible are available in five trim levels: base C300, C300 4Matic (all-wheel drive), AMG C43, AMG C63 and AMG C63 S. The sedan also gets a plug-in hybrid variant called the C350e. With the exception of the high-horsepower engines and sport-tuned components in the AMG models, most C-Classes get the same standard equipment and are available with a plethora of packaged and stand-alone options.

The C300 sedan (and C300 4Matic) comes standard with a turbocharged 2.0-liter four-cylinder engine (241 horsepower, 273 pound-feet of torque), a nine-speed automatic transmission, 17-inch wheels, automatic wipers, a rearview camera, a sunroof, dual-zone automatic climate control, a power tilt-and-telescoping steering wheel, 10-way power front seats (with four-way lumbar adjustment), driver-seat memory settings, simulated leather upholstery (the rather good MB-Tex) and 40/20/40-split folding rear seatbacks.

Standard tech includes the COMAND infotainment system (with a 7-inch central display screen and a console-mounted dial controller), Bluetooth and an audio system with a CD player, dual USB ports, an SD card reader and HD radio.

For the most part, the C300 coupe gets the same equipment plus 18-inch wheels. The C300 convertible gets a power-folding fabric top, Mercedes' Airscarf system — which delivers warmed air to the neck and shoulders of front passengers — and a removable wind blocker.

On top of the 18-inch wheels, the C350e (sedan only) gets a turbo 2.0-liter four-cylinder engine paired with an electric motor (275 hp combined), a seven-speed automatic transmission, an air-spring suspension with multiple tuning modes, and LED headlights.

Primary options packages for all C300s are essentially the same. The Premium package adds an electronic trunk closer, blind-spot monitoring, keyless entry and push-button start, and satellite radio. In the coupe and convertible, the Premium package also includes an upgraded Burmester sound system.

Several other options packages are available for the C300 and C350e as well as stand-alone options. We'll dispense with the packages first.

Options packages include the Multimedia package (an upgraded 8.4-inch screen with navigation, voice controls, touchpad infotainment controller); Advanced Lighting package (adaptive high-beam headlights, cornering headlamps, LED headlights, ambient interior lighting); Smartphone Integration package (Apple CarPlay and Android Auto compatibility); Parking Assist package (front and rear parking sensors, top-down parking camera system); the AMG Line package (upgraded brakes, sport suspension, a rear spoiler, unique bodywork); and the Driver Assistance package (forward collision mitigation, adaptive cruise control, lane keeping assist, rear cross-traffic alert).

Stand-alone options for the C300/350e include a panoramic sunroof, a head-up display, heated and ventilated seats, leather upholstery, a cabin air purification and fragrance system, a heated steering wheel, and a number of interior and exterior trim pieces.

For the most part, AMG C43 models get the Premium package equipment along with a turbocharged 3.0-liter V6 (362 hp, 384 lb-ft), all-wheel drive, a nine-speed automatic transmission, a sport tuned suspension, adaptive suspension dampers, heated front seats and unique interior trim.

The AMG C63 and C63 S are widely similar with the exception of the turbocharged 4.0-liter V8 (469 hp, 479 lb-ft with the C63; 503 hp, 516 lb-ft with the C63 S) and a multiclutch, high-performance seven-speed automatic transmission. Options for the AMG models include carbon-ceramic brakes, exhaust and upgraded wheels and tires sport seats, carbon-fiber interior and exterior trim, and a special AMG head-up display.

Trim tested

Each vehicle typically comes in multiple versions that are fundamentally similar. The ratings in this review are based on our full test of the 2017 Mercedes-Benz C300 4Matic Convertible (turbo 2.0L inline-4 | 9-speed automatic | AWD).

NOTE: Since this test was conducted, the current Mercedes-Benz C-Class has received some minor revisions. Our findings remain applicable to this year's Mercedes-Benz C-Class.


The C300 convertible drives just as you'd expect a luxury compact would, which is a very good thing. It places few demands on the driver yet still has plenty of power and decent handling when the mood hits. If performance is paramount, you may be better served by the AMG C43 variant.


The run up to 60 mph takes 6.1 seconds, which is about average for an all-wheel-drive vehicle in this class. Transmission shifts are smooth and quick in the default mode and more aggressive and abrupt in Sport mode. It gets up to speed without drama, but power tends to taper off a bit on the top end.


The C300 has an easy and light pedal in casual driving, yet it is composed and controllable under moderately hard braking.


The steering effort is appropriately light in parking lots and firms up on the highway for greater stability. It's very precise and predictable with a decent amount of feedback for a luxury-focused car.


Thanks to the all-wheel-drive system and summer tires, this C300 test vehicle has more traction than the typical driver will ever need in dry weather driving. There's still a moderate amount of body roll, and the tires howl loudly when pushed, but overall it's still very agreeable.


The C300 performs with luxury-car smoothness and is a joy to drive because it's easy to maneuver in tight spaces and requires little effort from the driver in typical conditions. The auto stop-start system is not as transparent as we'd like it to be.


We deem it critical to spring for the optional Airmatic suspension since ride quality is the only objection we have with the C300 Cabriolet. We've evaluated the Airmatic add-on, and it's a night-and-day difference in regard to comfort. Otherwise, the C300 gets high marks in this category.

Seat comfort

The standard front seats offer enough adjustment to allow drivers of any size and shape to find their optimal setting. Padding is firm, but the well-contoured surfaces make them comfortable for hours on end. Lateral support is more than adequate for the cornering limits of this car.

Ride comfort

The ride quality is too firm for a tourer such as the C300. We drove other C-Class models with the optional Airmatic suspension and the comfort setting is far more compliant and the sport setting feels comparable to the standard suspension. It's worth the extra cost, and we consider it necessary.

Noise & vibration

The convertible top does an excellent job of reducing wind and road noise to just noticeable levels. With the top down, buffeting is moderate, but the available Aircap system, which directs air over the cabin, greatly reduces wind noise and turbulence. The solid construction is devoid of squeaks.

Climate control

Once set, the automatic climate control doesn't need adjustment whether the top is up or down. With the windows and top down, there was enough coverage to keep us cool on a warm day. The Airscarf blows warm air on the back of your neck, which may seem frivolous right up until you try it yourself.


The C-Class' interior impresses with a graceful center stack and simple layout afforded by minimal buttons, but it also complicates the interface some. Most other interior aspects are typical for a convertible coupe, but we found the driving position and convertible top to be especially well done.

Ease of use

The number of buttons has been limited to essential functions, giving the cockpit a simple and elegant layout in which controls are logically placed. Secondary controls require some digging, though, and the menu structure can take some time to become familiar with.

Getting in/getting out

The long doors allow easy access to the front seats, and the seat-belt presenter eliminates the need to twist and reach for it. Rear-seat access is impeded with the top up, and the front seats take a while to move forward.

Driving position

There are enough adjustments and range within those adjustments to ensure drivers of any size and shape will find their optimal position in this drop-top.


The front seats are spacious enough for taller adults as the cockpit wraps around them without feeling confined. The rear seats have barely enough legroom for the average adult, and headroom is limited with the top up. The space feels claustrophobic in back.


Forward visibility is decent thanks to well-shaped roof pillars. With the top up, the small glass rear window limits what you can see and the rear blind spots grow. As far as convertibles go, it's not bad.


Even though we consider the C-Class an entry-level luxury vehicle, the materials used and sturdy construction exceed expectations. The same applies to its chief rivals, but the C-Class' overall interior design gives off more of an old-school luxury impression.


It should come as no surprise that you make sacrifices with the convertible when it comes to utility. It's the price you pay for open-air motoring, and the C300 Cabriolet comes in about average on all fronts in this category.

Small-item storage

There aren't a lot of bins and pockets in the cabin, but the ones that exist are adequately sized for your personal items. The cupholder bin can also hold a smartphone, but the USB ports are in the center armrest bin.

Cargo space

The C-Class convertible's trunk is a bit small. Carry-on luggage will fit with some jostling, but anything bigger will need to occupy the rear seats.

Child safety seat accommodation

As is typical with most convertibles in this class, a rear-facing child seat will simply not fit if the front passenger seat is occupied. Thankfully, the anchors are clearly marked and easy to tether to.


Mercedes' COMAND infotainment scores points for feature content but comes up short when it comes to usability. Competing systems have improved at a slightly quicker pace. The trace pad interface that hovers over the main rotary controller is especially challenging to get accustomed to.

Audio & navigation

The COMAND system has most of the features we expect, but the interface isn't as easy to use as those of rivals. The trace pad takes a lot of time to get used to and isn't as intuitive or consistently responsive as the rotary controller.

Driver aids

The handful of advanced safety features are appropriately sensitive, not triggering false alarms. The rearview camera view is about average for the class in a variety of lighting conditions.

Voice control

Voice recognition is accurate, even with the top down at highway speeds. It understands more natural language as opposed to the robotic chunks that systems usually prompt you with.

Consumer reviews

Read what other owners think about the 2018 Mercedes-Benz C-Class.

Overall Consumer Rating

Most helpful consumer reviews

An E Class look alike, but $20,000 cheaper
It is gorgeous, stunning, thumbs up.... An admirer said “It is so sexy”... nothing not to like. It is overall a very good car, but, base engine can’t get out of its own way, must leave the transmission in Sport Plus just to be safe. My previous 2014 E350 gets the same mpg ..... very sad.... The 9 speed transmission is as graceful as a bull in a china shop... not smooth at all. Shifts hard. The rest of the car is all Mercedes. The quality of fit and finish is impeccable. The interior is a work of art. The lines, slopes contours are so attractive. The car really is incredible in that Mercedes way.... The care bases at $51,000, with vinyl interior, aka “MB-Tex”, and no navigation.... When one options up the base car, Package 2, upgraded wheels, metallic paint, amg package, and leather interior (1,600.00) now it’s $62,000.00. I bought it used with 200 miles, so a deep discount... My thoughts are Mercedes needs to go back to their roots “build it and they will come”. They are stuck just wanting to compete with everyone else. I’ve owned Mercedes for over 20 years, and I’m not certain there will be a next...
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Features & Specs

22 city / 29 hwy
Seats 4
9-speed shiftable automatic
241 hp @ 5550 rpm
22 city / 29 hwy
Seats 4
9-speed shiftable automatic
241 hp @ 5550 rpm
19 city / 26 hwy
Seats 4
9-speed shiftable automatic
362 hp @ 5550 rpm
17 city / 22 hwy
Seats 4
7-speed shiftable automatic
469 hp @ 5500 rpm
See all 2018 Mercedes-Benz C-Class Convertible features & specs


Our experts’ favorite C-Class safety features:

Collision Prevention Assist
Warns the driver audibly and will apply the brakes if it senses a forward collision.
Surround-View System
Gives a 360-degree view of the car for tight parking spaces and lots to avoid striking objects or pedestrians.
Active Blind-Spot Assist
Senses when a vehicle enters one of your blind spots. Can warn the driver and even help steer the C-Class back.
IIHS Rating
The Insurance Institute of Highway Safety uses extensive crash tests to determine car safety.
  • Side Impact Test
  • Roof Strength Test
  • Rear Crash Protection / Head Restraint
  • IIHS Small Overlap Front Test
  • Moderate Overlap Front Test

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More about the 2018 Mercedes-Benz C-Class

The 2018 Mercedes-Benz C-Class began life as the smallest Mercedes (the "Baby Benz"), but it has now grown to near midsize proportions, offering a level of roominess and comfort that rivals that you'll find in many larger cars. With the CLA-Class taking over as the compact Mercedes, the C-Class models are not the lowest-level Mercedes vehicles. But with a wide range of trim levels and price points, they can still hit the mark for shoppers looking for a modest-size luxury car.

Sedan, coupe and convertible, the luxurious design of the C-Class interior is sure to have wide appeal, and the choice of materials — wood veneer, gleaming brightwork and lush seating surfaces — won't disappoint even the most discriminating buyers. There's plenty of room for front-seat occupants to stretch out, although additional passengers might find entry into the back seat a bit of a challenge. And even though the feel of the interior is classic, there's no shortage of modern technology available, including the latest version of the Mercedes COMAND infotainment interface.

The standard powerplant is a 2.0-liter turbocharged four-cylinder engine that produces 241 horsepower and 273 pound-feet of torque and comes linked to a nine-speed automatic transmission. Not enough power for you? There's also an AMG C43 model with a 363-horsepower twin-turbo V6, as well as an AMG C63 and C63S with twin-turbo V8s that put out 469 and 503 hp, respectively.

Performance, even with the base engine, will likely satisfy the vast majority of buyers. Although the C-Class isn't an all-out sports model, acceleration is sprightly, and there's plenty of power for comfortable, quiet highway cruising. Different driving modes allow drivers to tailor responses to suit their moods, and the available Mercedes 4Matic all-wheel-drive system provides extra traction when needed.

C-Class models include the very well-equipped standard C300 sedan, C300 coupe or the Cabriolet, and the plug-in hybrid C350e, any of which can be further enhanced with a large variety of packages and options. The AMG C43 and C63 models are available for those who are looking for more spirited driving. Whatever your preference, let Edmunds help you find the vehicle that best meets your needs.

2018 Mercedes-Benz C-Class Convertible Overview

The 2018 Mercedes-Benz C-Class Convertible is offered in the following styles: C 300 2dr Convertible (2.0L 4cyl Turbo 9A), C 300 4MATIC 2dr Convertible AWD (2.0L 4cyl Turbo 9A), AMG C 43 2dr Convertible AWD (3.0L 6cyl Turbo 9A), AMG C 63 2dr Convertible (4.0L 8cyl Turbo 7A), and AMG C 63 S 2dr Convertible (4.0L 8cyl Turbo 7A).

What do people think of the 2018 Mercedes-Benz C-Class Convertible?

Consumer ratings and reviews are also available for the 2018 Mercedes-Benz C-Class Convertible and all its trim types. Overall, Edmunds users rate the 2018 C-Class Convertible 4 on a scale of 1 to 5 stars. Edmunds consumer reviews allow users to sift through aggregated consumer reviews to understand what other drivers are saying about any vehicle in our database. Detailed rating breakdowns (including performance, comfort, value, interior, exterior design, build quality, and reliability) are available as well to provide shoppers with a comprehensive understanding of why customers like the 2018 C-Class Convertible.

Edmunds Expert Reviews

Edmunds experts have compiled a robust series of ratings and reviews for the 2018 Mercedes-Benz C-Class Convertible and all model years in our database. Our rich analysis includes expert reviews and recommendations for the 2018 C-Class Convertible featuring deep dives into trim levels including C 300, C 300 4MATIC, AMG C 43, etc. with careful analysis around pricing, features, performance, mpg, safety, interior, and driving and performance. Edmunds also offers expert ratings, road test and performance data, long-term road tests, first-drive reviews, video reviews and more.

Read our full review of the 2018 Mercedes-Benz C-Class Convertible here.
Our Review Process

This review was written by a member of Edmunds' editorial team of expert car reviewers. Our team drives every car you can buy. We put the vehicles through rigorous testing, evaluating how they drive and comparing them in detail to their competitors.

We're also regular people like you, so we pay attention to all the different ways people use their cars every day. We want to know if there's enough room for our families and our weekend gear and whether or not our favorite drink fits in the cupholder. Our editors want to help you make the best decision on a car that fits your life.

What's a good price for a New 2018 Mercedes-Benz C-Class Convertible?
2018 Mercedes-Benz C-Class Convertible AMG C 63 S 2dr Convertible (4.0L 8cyl Turbo 7A)
Available Inventory:

We are showing 2 2018 Mercedes-Benz C-Class Convertible AMG C 63 S 2dr Convertible (4.0L 8cyl Turbo 7A) vehicle(s) available in the in the Ashburnarea.

2018 Mercedes-Benz C-Class Convertible AMG C 43 2dr Convertible AWD (3.0L 6cyl Turbo 9A)
Available Inventory:

We are showing 1 2018 Mercedes-Benz C-Class Convertible AMG C 43 2dr Convertible AWD (3.0L 6cyl Turbo 9A) vehicle(s) available in the in the Ashburnarea.

2018 Mercedes-Benz C-Class Convertible C 300 2dr Convertible (2.0L 4cyl Turbo 9A)
Available Inventory:

We are showing 1 2018 Mercedes-Benz C-Class Convertible C 300 2dr Convertible (2.0L 4cyl Turbo 9A) vehicle(s) available in the in the Ashburnarea.

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Which 2018 Mercedes-Benz C-Class Convertibles are available in my area?

2018 Mercedes-Benz C-Class Convertible Listings and Inventory

There are currently 6 new 2018 Mercedes-Benz C-Class Convertibles listed for sale in your area, with list prices as low as $56,820 and mileage as low as 0 miles. Simply research the type of used car you're interested in and then select a car from our massive database to find cheap used cars for sale near you. Once you have identified a vehicle you're interested in, check the Carfax and Autocheck vehicle history reports, read dealer reviews, and find out what other owners paid for the 2018 Mercedes-Benz C-Class Convertible.

Shop Edmunds' car, SUV, and truck listings of over 6 million vehicles to find a cheap new, used, or certified pre-owned (CPO) 2018 Mercedes-Benz C-Class Convertible for sale near you.

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Why trust Edmunds?

Edmunds has deep data on over 6 million new, used, and certified pre-owned vehicles, including all models of the 2018 Mercedes-Benz C-Class Convertible and all available trim types: AMG C 63 S, C 300 4MATIC, AMG C 43, etc. Rich, trim-level features & specs and options data tracked for the 2018 Mercedes-Benz C-Class Convertible include (but are not limited to): MSRP, available incentives and deals, average price paid, warranty information (basic, drivetrain, and maintenance), features (interior and exterior color, upholstery, bluetooth, navigation, cruise control, parking assistance, lane sensing, keyless ignition, satellite radio, folding rears seats,run flat tires, wheel type, tire size, sunroof, etc.), vehicle specifications (engine cylinder count, drivetrain, engine power, torque, engine displacement, transmission), fuel economy and MPG (city, highway, and combined, fuel capacity, range), vehicle dimensions (interior cabin space, vehicle length and width, seating capacity, cargo space). Edmunds also provides tools to allow shopper to compare vehicles to similar models of their choosing by warranty, interior features, exterior features, specifications, vehicle dimensions, consumer rating, edmunds expert review, safety rating, and color.

Should I lease or buy a 2018 Mercedes-Benz C-Class?

Is it better to lease or buy a car? Ask most people and they'll probably tell you that car buying is the way to go. And from a financial perspective, it's true, provided you're willing to make higher monthly payments, pay off the loan in full and keep the car for a few years. Leasing, on the other hand, can be a less expensive option on a month-to-month basis. It's also good if you're someone who likes to drive a new car every three years or so.

Check out Mercedes-Benz lease specials