2019 BMW 4 Series Convertible vs. 2019 Mercedes C-Class Cabriolet

Detailed Review, Specifications & Comparison

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Safety

Both the 4 Series Convertible 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 seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems and around view monitors.

Warranty

The 4 Series Convertible’s corrosion warranty is 7 years longer than the C-Class Cabriolet’s (12 vs. 5 years).

BMW pays for scheduled maintenance on the 4 Series Convertible for 3 years and 36,000 miles. BMW will pay for oil changes, lubrication and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the C-Class Cabriolet.

Reliability

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 4 Series Convertible’s reliability 33 points higher than the C-Class Cabriolet.

J.D. Power and Associates rated the 4 Series Convertible first among compact premium cars in their 2018 Initial Quality Study. The C-Class Cabriolet isn’t in the top three in its category.

J.D. Power and Associates’ 2018 Initial Quality Study of new car owners surveyed provide the statistics that show that BMW vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks BMW 11th in initial quality, above the industry average. With 5 more problems per 100 vehicles, Mercedes is ranked 14th.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that BMW vehicles are more reliable than Mercedes vehicles. J.D. Power ranks BMW 8th in reliability, above the industry average. With 20 more problems per 100 vehicles, Mercedes is ranked 15th.

From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks BMW 9 places higher in reliability than Mercedes.

Engine

The 440i Convertible’s standard 3.0 turbo 6 cyl. produces 67 more horsepower (322 vs. 255) and 59 lbs.-ft. more torque (332 vs. 273) than the C 300 Cabriolet’s standard 2.0 turbo 4 cyl.

Fuel Economy and Range

On the EPA test cycle the 4 Series Convertible gets better fuel mileage than the C-Class Cabriolet:

 

 

 

MPG

4 Series Convertible

 

RWD

430i 2.0 turbo 4 cyl.

24 city/34 hwy

 

AWD

430i 2.0 turbo 4 cyl.

22 city/32 hwy

C-Class Cabriolet

 

RWD

300 2.0 turbo 4 cyl.

21 city/29 hwy

 

AWD

300 2.0 turbo 4 cyl.

21 city/29 hwy

Regenerative brakes improve the 4 Series Convertible’s fuel efficiency by converting inertia back into energy instead of wasting it. The C-Class Cabriolet doesn’t offer a regenerative braking system.

Environmental Friendliness

The U.S. Environmental Protection Agency (EPA) certifies the BMW 4 Series Convertible as a “Super Ultra Low Emissions Vehicle” (SULEV). The Mercedes C-Class Cabriolet is only certified to “Ultra Low Emissions Vehicle” (ULEV) standards.

Suspension and Handling

For better handling and stability, the track (width between the wheels) on the 4 Series Convertible is 1.6 inches wider in the rear than the average track on the C-Class Cabriolet.

Chassis

The 4 Series Convertible’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The C-Class Cabriolet doesn’t offer a retractable hardtop.

Passenger Space

The 4 Series Convertible has 8.7 cubic feet more passenger volume than the C-Class Cabriolet (90 vs. 81.3).

The 4 Series Convertible has 1.6 inches more front headroom, .2 inches more front legroom, .5 inches more front shoulder room, 1.5 inches more rear headroom and 1.1 inches more rear legroom than the C-Class Cabriolet.

Cargo Capacity

The 4 Series Convertible has a larger trunk with its top down than the C-Class Cabriolet with its top down (7.8 vs. 7 cubic feet). The 4 Series Convertible has a much larger trunk with its top up than the C-Class Cabriolet with its top up (13.1 vs. 8.8 cubic feet).

To make loading groceries and cargo easier when your hands are full, the 4 Series Convertible’s available trunk can be opened just by kicking your foot under the back bumper, leaving your hands completely free. The C-Class Cabriolet doesn’t offer a hands-free gesture to open its trunk, forcing you to put cargo down if your hands are full.

Ergonomics

Heated windshield washer nozzles are standard on the 4 Series Convertible 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.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The 4 Series Convertible offers available headlight washers to keep headlight output high. The C-Class Cabriolet doesn’t offer headlight washers.

A power rear sunshade is optional in the 4 Series Convertible to help block heat and glare for the rear passengers. The C-Class Cabriolet doesn’t offer a rear sunshade.

The 4 Series Convertible has a standard center folding armrest for the rear passengers. A center armrest helps make rear passengers more comfortable. The C-Class Cabriolet doesn’t offer a rear seat center armrest.

Recommendations

J.D. Power and Associates rated the 4 Series Convertible third among compact premium cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The C-Class Cabriolet isn’t in the top three.

The 4 Series Convertible was chosen as one of Car and Driver’s “Top Ten” in 2014. The C-Class Cabriolet has never been a Car and Driver “Top Ten” pick.

The 4 Series Convertible was chosen as one of Automobile Magazine’s “All Stars” in 2014. The C-Class Cabriolet has never been an “All Star.”

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

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