2019 Buick Cascada vs. 2019 Mercedes E-Class Cabriolet

Detailed Review, Specifications & Comparison

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The Cascada has standard Active Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the Active Head Restraints system moves the headrests forward to prevent neck and spine injuries. The E-Class Cabriolet doesn’t offer a whiplash protection system.

Both the Cascada 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, daytime running lights, rearview cameras, available collision warning systems, lane departure warning systems and front parking sensors.


Buick’s powertrain warranty covers the Cascada 2 years and 20,000 miles longer than Mercedes covers the E-Class Cabriolet. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 6 years or 70,000 miles. Coverage on the E-Class Cabriolet ends after only 4 years or 50,000 miles.

The Cascada’s corrosion warranty is 1 year longer than the E-Class Cabriolet’s (6 vs. 5 years).

Buick pays for the first scheduled maintenance on the Cascada. Buick will pay for the first oil change, lubrication and any other required maintenance in the first year. Mercedes doesn’t pay scheduled maintenance for the E-Class Cabriolet.

There are over 5 times as many Buick dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Cascada’s warranty.


The Buick Cascada’s engine uses a cast iron block for durability, while the E-Class Cabriolet’s engines use an aluminum block. Aluminum engine blocks are much more prone to warp and crack at high temperatures than cast iron.

J.D. Power and Associates’ 2018 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Buick vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Buick third in reliability, above the industry average. With 31 more problems per 100 vehicles, Mercedes is ranked 15th.

Fuel Economy and Range

On the EPA test cycle the Cascada gets better fuel mileage than the E 450 Cabriolet RWD (21 city/29 hwy vs. 20 city/27 hwy).

To lower fuel costs and make buying fuel easier, the Buick Cascada uses regular unleaded gasoline (premium recommended for maximum performance). The E-Class Cabriolet requires premium, which can cost 20 to 55 cents more per gallon.

Tires and Wheels

The Cascada’s 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.

For better ride, handling and brake cooling the Cascada has standard 20-inch wheels. Smaller 18-inch wheels are standard on the E-Class Cabriolet.

The Cascada has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the E-Class Cabriolet; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some models of the E-Class Cabriolet don’t even offer run-flats.


The Buick Cascada may be more efficient, handle and accelerate better because it weighs about 200 to 350 pounds less than the Mercedes E-Class Cabriolet.

The Cascada is 5.1 inches shorter than the E-Class Cabriolet, making the Cascada easier to handle, maneuver and park in tight spaces.

Cargo Capacity

The Cascada has a larger trunk with its top down than the E-Class Cabriolet (9.8 vs. 9.5 cubic feet).

Pressing a switch automatically lowers the Cascada’s rear seats, to make changing between passengers and cargo easier. The E-Class Cabriolet doesn’t offer automatic folding seats.


The Cascada has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the E-Class Cabriolet.

Economic Advantages

Insurance will cost less for the Cascada owner. The Complete Car Cost Guide estimates that insurance for the Cascada will cost $2320 to $3270 less than the E-Class Cabriolet over a five-year period.

According to The Car Book by Jack Gillis, the Cascada is less expensive to operate than the E-Class Cabriolet because typical repairs cost much less on the Cascada than the E-Class Cabriolet, including $170 less for a water pump, $47 less for a muffler, $480 less for a starter, $182 less for fuel injection, $137 less for a fuel pump, $631 less for a timing belt/chain and $145 less for a power steering pump.

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Buick Cascada will be $21788 to $22810 less than for the Mercedes E-Class Cabriolet.

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

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