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2020 Mercedes-Benz SL 450

2020 Mercedes-Benz SL 450

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$75,880 — $104,719 NEW and USED
2 Seats
22 MPG
Key specs of the base trim
Compare 1 trims


Is this the car for you?

The Good

  • Acceleration
  • Comfortable ride
  • Magic Sky Control roof
  • Trunk accessibility

The Bad

  • A bit noisy inside for a hardtop
  • Heavy
  • Understeer
2020 Mercedes-Benz SL 450 exterior side view

What to Know

about the 2020 Mercedes-Benz SL 450
  • New Grand Edition available
  • Retractable-hardtop convertible
  • Two seats
  • V-6 or V-8 power

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2020 Mercedes-Benz SL 450 Review

from the expert editorial team

What Is the 2020 Mercedes-Benz SL-Class?

The two-seat Mercedes-Benz SL-Class, a retractable-hardtop convertible, is constructed mostly of aluminum and is offered with a choice of V-6 or V-8 power. The SL450 gets a 362-horsepower, twin-turbocharged 3.0-liter V-6 engine, while the SL550 uses a 449-hp, twin-turbo 4.7-liter V-8. Both models have rear-wheel drive and a nine-speed automatic transmission. The SL competes with the BMW 8 Series and Lexus LC 500.

What’s New on the 2020 Mercedes-Benz SL-Class?

Keyless access and push-button start are now standard, and a new limited-edition Grand Edition is available. The Grand Edition features Graphite Grey paint, AMG 10-spoke wheels, revised front bumper styling, brown and black Nappa leather upholstery with gray contrast stitching and piping, embroidered floormats, Grand Edition badges and the Premium and Driver Assistance packages. Mercedes will produce 100 SL450 Grand Editions and 100 SL550 Grand Editions.

What Features in the 2020 Mercedes-Benz SL-Class Are Most Important?

The SL comes with features not found on many other cars. The power-retractable roof can be raised or lowered while the car is moving at up to 25 mph. When the top is up, an available panoramic glass section can automatically change from dark to transparent. An available active suspension adjusts to reduce body roll in corners and lowers automatically at high speeds.

Should I Buy the 2020 Mercedes-Benz SL-Class?

The SL roadster has been coddling Mercedes customers for more than 60 years, and though it doesn’t rank in the same performance league as the Porsche 911, the SL550 is hardly a boulevard cruiser. All in all, the SL offers elegant surroundings and enough verve to keep most drivers entertained.

Consumer Reviews

What drivers are saying

4 reviews — Read All reviews
Exterior Styling
Interior Design
Value For The Money

Very Happy with SL450

by Johnny G from Greenwood, Ms. on November 5, 2020

Recently traded a 2019 Corvette Z06 for this 2020 SL450. The Mercedes is much quieter and rides better. Quality and fun factor is high. Mercedes infotainment system and menus needs to be more user ... Read full review


Best Car I've ever owned

by James C from Laguna Beach, CA on April 5, 2020

Great car - I love the SL its my second one great styling, comfort and power. Pust a smile on my face every time I see it. Read full review


Recalls and crash tests


The 2020 Mercedes-Benz SL 450 currently has 0 recalls

Crash and Rollover Test Ratings

The 2020 Mercedes-Benz SL 450 has not been tested.


New car and certified pre-owned programs by Mercedes-Benz

New Car Program Benefits

  • Bumper-to-Bumper

    48 months / 50,000 miles

  • Powertrain

    48 months / 50,000 miles

  • Roadside Assistance

    48 months / 50,000 miles

Latest 2020 SL 450 Stories

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0 Photos
0 / 0 Car Seat Check

Certified child passenger safety technicians conduct hands-on tests of a car’s Latch system and check the vehicle’s ability to accommodate different types of car seats. The SL 450 received the following grades on a scale of A-F.*
* This score may not apply to all trims, especially for vehicles with multiple body styles that affect the space and design of the seating.

Warranty FAQs

What is a Bumper-to-Bumper warranty?

Often called a basic warranty or new-vehicle warranty, a bumper-to-bumper policy covers components like air conditioning, audio systems, vehicle sensors, fuel systems and major electrical components. Most policies exclude regular maintenance like fluid top offs and oil changes, but a few brands have separate free-maintenance provisions, and those that do offer them is slowly rising. Bumper-to-bumper warranties typically expire faster than powertrain warranties.

What is a Powertrain warranty?

Don't be misled a 10-year or 100,000-mile powertrain warranty doesn't promise a decade of free repairs for your car. It typically covers just the engine and transmission, along with any other moving parts that lead to the wheels, like the driveshaft and constant velocity joints. Some automakers also bundle seat belts and airbags into their powertrain warranties. With a few exceptions, powertrain warranties don't cover regular maintenance like engine tuneups and tire rotations.

What is included in Roadside Assistance?

Some automakers include roadside assistance with their bumper-to-bumper or powertrain warranties, while others have separate policies. These programs cover anything from flat-tire changes and locksmith services to jump-starts and towing. Few reimburse incidental costs like motel rooms (if you have to wait for repairs).

What other services could be included in a warranty?

Some automakers include free scheduled maintenance for items such as oil changes, air filters and tire rotations. Some include consumables including brake pads and windshield wipers; others do not. They are typically for the first couple of years of ownership of a new car.

What does CPO mean?

A certified pre-owned or CPO car has been inspected to meet minimum quality standards and typically includes some type of warranty. While dealers and third parties certify cars, the gold standard is an automaker-certified vehicle that provides a factory-backed warranty, often extending the original coverage. Vehicles must be in excellent condition and have low miles and wear to be certified, which is why off-lease vehicles feed many CPO programs.

See also the latest CPO incentives by automaker

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*MSRP and Invoice prices displayed are for educational purposes only, do not reflect the actual selling price of a particular vehicle, and do not include applicable gas taxes or destination charges.