2019 Audi S5 vs. 2019 Mercedes E-Class Cabriolet

Detailed Review, Specifications & Comparison

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Safety

The S5 has standard Secondary Collision Brake Assist, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The E-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 S5. But it costs extra on the E-Class Cabriolet.

Both the S5 and the E-Class Cabriolet have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available lane departure warning systems, blind spot warning systems, around view monitors and rear cross-path warning.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard front crash prevention system, the Insurance Institute for Highway Safety grants the S5 the rating of “Top Pick” for 2017, a rating granted to only 139 vehicles tested by the IIHS. The E-Class Cabriolet has not been tested, yet.

Warranty

The S5’s corrosion warranty is 7 years longer than the E-Class Cabriolet’s (12 vs. 5 years).

Reliability

J.D. Power and Associates’ 2018 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 13th in reliability, above the industry average. With 6 more problems per 100 vehicles, Mercedes is ranked 15th.

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.

Fuel Economy and Range

On the EPA test cycle the S5 Cabriolet gets better fuel mileage than the E 450 Cabriolet 4MATIC (21 city/29 hwy vs. 19 city/26 hwy).

Regenerative brakes improve the S5’s fuel efficiency by converting inertia back into energy instead of wasting it. The E-Class Cabriolet doesn’t offer a regenerative braking system.

Tires and Wheels

For better traction, the S5’s optional tires are larger than the largest tires available on the E-Class Cabriolet (265/30R20 vs. 245/45R18).

The S5’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 E-Class Cabriolet 4MATIC’s standard 45 series tires. The S5’s optional tires have a lower 30 series profile than the E-Class Cabriolet’s optional 35 series front tires.

Chassis

The Audi S5 may be more efficient, handle and accelerate better because it weighs about 100 to 350 pounds less than the Mercedes E-Class Cabriolet.

The S5 is 5.3 inches shorter than the E-Class Cabriolet, making the S5 easier to handle, maneuver and park in tight spaces.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Audi service is better than Mercedes. J.D. Power ranks Audi third in service department satisfaction. With a 3% lower rating, Mercedes is ranked 6th.

Ergonomics

Heated windshield washer nozzles are standard on the S5 to prevent washer fluid and nozzles from freezing and help continue to keep the windshield clear in sub-freezing temperatures. The E-Class Cabriolet doesn’t offer heated windshield washer nozzles.

Economic Advantages

The S5 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the S5 will retain 48.53% to 51.66% of its original price after five years, while the E-Class Cabriolet only retains 44.54% to 45.17%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Audi S5 will be $578 to $7566 less than for the Mercedes E-Class Cabriolet.

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

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