2020 BMW M4 vs. 2020 Mercedes AMG E-Class Cabriolet

Detailed Review, Specifications & Comparison

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Safety

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Both the M4 and the AMG E-Class Cabriolet have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available blind spot warning systems and around view monitors.

Warranty

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The M4’s corrosion warranty is 7 years longer than the AMG E-Class Cabriolet’s (12 vs. 5 years).

BMW pays for scheduled maintenance on the M4 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 AMG E-Class Cabriolet.

Reliability

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J.D. Power and Associates’ 2019 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 7th in reliability, above the industry average. With 12 more problems per 100 vehicles, Mercedes is ranked 13th.

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

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The M4’s standard 3.0 turbo 6 cyl. produces 22 lbs.-ft. more torque (406 vs. 384) than the AMG E-Class Cabriolet’s 3.0 turbo 6 cyl. hybrid. The M4’s optional 3.0 turbo 6 cyl. produces 15 more horsepower (444 vs. 429) and 22 lbs.-ft. more torque (406 vs. 384) than the AMG E-Class Cabriolet’s 3.0 turbo 6 cyl. hybrid. The M4 CS Coupe’s standard 3.0 turbo 6 cyl. produces 24 more horsepower (453 vs. 429) and 58 lbs.-ft. more torque (442 vs. 384) than the AMG E-Class Cabriolet’s 3.0 turbo 6 cyl. hybrid.

Transmission

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The M4 offers a manual transmission for better acceleration, control and fuel economy. The AMG E-Class Cabriolet doesn’t offer a manual transmission.

The M4 offers an optional 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 AMG E-Class Cabriolet doesn’t offer an SMG.

Brakes and Stopping

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For better stopping power the M4’s brake rotors are larger than those on the AMG E-Class Cabriolet:

M4

M4

AMG E-Class Cabriolet

Front Rotors

15 inches

15.7 inches

14.6 inches

Rear Rotors

14.6 inches

15 inches

14.2 inches

The M4 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 AMG E-Class Cabriolet doesn’t offer ceramic brake rotors.

Tires and Wheels

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For better traction, the M4 has larger front standard tires than the AMG E-Class Cabriolet (F:255/40R18 & R:275/40R18 vs. F:245/40R19 & R:275/35R19). The M4’s optional tires are larger than the largest tires available on the AMG E-Class Cabriolet (F:265/30R20 & R:285/30R20 vs. F:245/40R19 & R:275/35R19).

The M4’s optional tires provide better handling because they have a lower 30 series profile (height to width ratio) that provides a stiffer sidewall than the AMG E-Class Cabriolet’s optional 35 series front tires.

Chassis

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The BMW M4 may be more efficient, handle and accelerate better because it weighs about 400 to 950 pounds less than the Mercedes AMG E-Class Cabriolet.

The M4 is 6.1 inches shorter than the AMG E-Class Cabriolet, making the M4 easier to handle, maneuver and park in tight spaces.

The M4’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The AMG E-Class Cabriolet doesn’t offer a retractable hardtop.

Passenger Space

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The M4 Convertible has 2.9 cubic feet more passenger volume than the AMG E-Class Cabriolet (89.9 vs. 87).

Ergonomics

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In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The M4 offers available headlight washers to keep headlight output high. The AMG E-Class Cabriolet doesn’t offer headlight washers.

A power rear sunshade is optional in the M4 Coupe to help block heat and glare for the rear passengers. The AMG E-Class Cabriolet doesn’t offer a rear sunshade.

Economic Advantages

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The M4 will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the M4 will retain 47.57% to 52.61% of its original price after five years, while the AMG E-Class Cabriolet only retains 39.53%.

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 2019/12/13

The M3/M4 was chosen as one of Automobile Magazine’s “All Stars” for 13 of the last 23 years. The E-Class has never been an “All Star.”

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