2019 Buick Cascada vs. 2019 Mercedes SLC

Detailed Review, Specifications & Comparison

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Both the Cascada and the SLC 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 collision warning systems, lane departure warning systems and front parking sensors.

The Buick Cascada weighs 438 to 683 pounds more than the Mercedes SLC. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.


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

The Cascada’s corrosion warranty is 1 year longer than the SLC’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 SLC.

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 SLC’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

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

Tires and Wheels

For better traction, the Cascada has larger tires than the SLC (245/40R20 vs. 225/45R17). The Cascada’s tires are larger than the largest tires available on the SLC (245/40R20 vs. 235/40R18).

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 SLC 300’s standard 45 series front tires.

For better ride, handling and brake cooling the Cascada has standard 20-inch wheels. Smaller 17-inch wheels are standard on the SLC 300. The SLC’s largest wheels are only 18-inches.

Suspension and Handling

For a smoother ride and more stable handling, the Cascada’s wheelbase is 10.4 inches longer than on the SLC (106.1 inches vs. 95.7 inches).

For better handling and stability, the track (width between the wheels) on the Cascada is 1.5 inches wider in the front and .8 inches wider in the rear than the average track on the SLC.

Passenger Space

The Cascada has standard seating for 4 passengers; the SLC can only carry 2.

The Cascada has 33.2 cubic feet more passenger volume than the SLC (82 vs. 48.8).

Cargo Capacity

The Cascada has a much larger trunk with its top down than the SLC with its top down (9.8 vs. 6.4 cubic feet). The Cascada has a much larger trunk with its top up than the SLC with its top up (13.4 vs. 10.1 cubic feet).


The Cascada’s front and rear power windows all open or close with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside of the car. The SLC’s rear power window switches have to be held the entire time to close them fully.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Cascada has standard extendable sun visors. The SLC doesn’t offer extendable visors.

On extremely cold winter days, the Cascada’s standard heated steering wheel provides comfort, allowing the driver to steer safely and comfortably before the car heater warms up. The SLC doesn’t offer a heated steering wheel.

The Cascada has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the SLC.

Economic Advantages

IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the Buick Cascada will be $7413 to $13964 less than for the Mercedes SLC.


The Buick Cascada outsold the Mercedes SLC by over two to one during 2018.

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

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