2019 Mercedes E-Class Cabriolet vs. 2018 BMW 6 Series

Detailed Review, Specifications & Comparison

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For enhanced safety, the front and rear seat shoulder belts of the Mercedes E-Class Cabriolet have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The BMW 6 Series doesn’t offer pretensioners for the rear seat belts.

The E-Class Cabriolet has standard front and rear seat side-impact airbags and head airbags, which act as a forgiving barrier between the passengers and the door. Combined with high-strength steel door beams this system increases protection from broadside collisions. The 6 Series doesn't offer rear-seat side-impact airbags, only ones for front seat occupants.

To help make backing safer, the E-Class Cabriolet’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 6 Series doesn’t offer a cross-path warning system.

Both the E-Class Cabriolet and the 6 Series have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, driver alert monitors, available all wheel drive, lane departure warning systems, blind spot warning systems and around view monitors.


There are over 10 percent more Mercedes dealers than there are BMW dealers, which makes it easier should you ever need service under the E-Class Cabriolet’s warranty.


A nine-speed automatic is standard on the Mercedes E-Class Cabriolet, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the 6 Series.

Brakes and Stopping

For better stopping power the E-Class Cabriolet’s standard brake rotors are larger than those on the 6 Series:


E-Class Cabriolet

6 Series

Front Rotors

14.2 inches

13.7 inches

Rear Rotors

14.2 inches

13.6 inches

Suspension and Handling

The E-Class Cabriolet has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The E-Class Cabriolet’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The 6 Series doesn’t offer a load leveling suspension.

The E-Class Cabriolet’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 6 Series doesn’t offer drift compensation steering.

For better maneuverability, the E-Class Cabriolet’s turning circle is .9 feet tighter than the 6 Series’ (37.5 feet vs. 38.4 feet).

Passenger Space

The E-Class Cabriolet has .4 inches more front headroom and 3.6 inches more rear legroom than the 6 Series.

Cargo Capacity

The E-Class Cabriolet’s standard rear seats fold to accommodate long and bulky cargo. The 6 Series doesn’t offer folding rear seats, only a ski pass-through.

To make loading and unloading groceries and cargo easier when your hands are full, the E-Class Cabriolet’s power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The 6 Series doesn’t offer a power or hands-free opening trunk.

Servicing Ease

J.D. Power and Associates surveys of service recipients show that Mercedes service is better than BMW. J.D. Power ranks Mercedes 6th in service department satisfaction (above the industry average). With a 11% lower rating, BMW is ranked 8th.


The E-Class Cabriolet 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 6 Series doesn’t offer a remote starting system.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the E-Class Cabriolet has standard extendable sun visors. The 6 Series doesn’t offer extendable visors.

Both the E-Class Cabriolet and the 6 Series offer rear vents. For greater rear passenger comfort, the E-Class Cabriolet has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The 6 Series doesn’t offer rear air conditioning vents, only heat vents.

Model Availability

The Mercedes E-Class comes in coupe, convertible, sedan and station wagon bodystyles; the BMW 6 Series isn’t available as a coupe, sedan or station wagon.

Economic Advantages

Insurance will cost less for the E-Class Cabriolet owner. The Complete Car Cost Guide estimates that insurance for the E-Class Cabriolet will cost $3010 to $6110 less than the 6 Series over a five-year period.

The E-Class Cabriolet will cost the buyer less in the long run because of its superior resale value. The IntelliChoice estimates that the E-Class Cabriolet will retain 44.54% to 45.17% of its original price after five years, while the 6 Series only retains 35.47% to 36.86%.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Mercedes E-Class Cabriolet will be $20301 to $56342 less than for the BMW 6 Series.


The E-Class was chosen as one of Car and Driver’s “Top Ten” in 2018. The 6 Series has never been a Car and Driver “Top Ten” pick.

The Mercedes E-Class outsold the BMW 6 Series by over 11 to one during the 2018 model year.

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

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