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Mercedes-Benz · Sports car

2020 Mercedes-Benz SL-Class

Gas
Two Seaters
2 EPA-rated configurations
Data refreshed 2026-09-11
C
Safety Signal
79 / 100 from the NHTSA recall record
Recalls1 critical3
Complaintsowner reports to NHTSA2
Crash ratingNHTSA overall
Fuel economybest combined, EPA22 mpg
20272026202520242023202220202019201820172016

The 2020 Mercedes-Benz SL-Class is sold in the U.S. as a gas sports car with 2 EPA-rated configurations. The most efficient version, the SL450, is EPA-rated at 22 mpg combined. NHTSA lists 3 recall campaigns for this model year, 1 rated critical, which gives it a Safety Signal grade of C. Owners have filed 2 complaints, most often about the electrical system.

Specs & fuel economy

Source: EPA fueleconomy.gov
ConfigurationPowertrainDriveEngine / motorCityHwyCombAnnual fuel*
SL450GasRWD3.0L 6-cyl turbo202822$3,500
SL550GasRWD4.7L 8-cyl turbo172520$3,900

*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 41790, 41789.

Factory warranty running out?

The 2020 Mercedes-Benz SL-Class is in the years where transmission, electronics and drivetrain repairs land on the owner. Compare extended-coverage quotes in about two minutes.

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Recalls (3)

Source: NHTSA recall database
minor

Electrical System

See Recall Schedule
242,722 vehicles
ProblemMercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system.RiskA disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.FixThe communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.
NHTSA campaign 22V365000reported May 20, 2022Mercedes-Benz USA, LLC
!critical

Fuel System, Gasoline

2022030003
139 vehicles
ProblemMercedes-Benz USA, LLC (MBUSA) is recalling certain 2019 AMG G63, C300, E300, G550, AMG GT63, AMG GT53, 2019-2020 A220, GLA250, GLC300, 2016 C300, 2020 AMG A35, AMG C43, AMG C63, CLA250, E350, E450, GLB250, GLE450, GLS450, GLS580, S560, and SL550 vehicles equipped with a gasoline engine. During the manufacturing process, particles may have been trapped between the fuel rail and injectors, which can cause a fuel leak.RiskA fuel leak in the presence of an ignition source, such as hot engine or exhaust components, can increase the risk of a fire.FixDealers will replace the fuel rail and fuel injectors, free of charge. Owner notification letters were mailed April 22, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for the recall is 2022030003.
NHTSA campaign 21V961000reported Dec 13, 2021Mercedes-Benz USA, LLC
minor

Electrical System

2021020025
1,292,258 vehicles
ProblemMercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash.RiskFailure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.FixMBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.
NHTSA campaign 21V058000reported Feb 5, 2021Mercedes-Benz USA, LLC

Owner complaints

Source: NHTSA complaint database
2complaints filed

1 involved a crash · 0 a fire · 1 injuries · 0 deaths reported

Filed per year: 2021: 1 · 2026: 1

Most-cited components

Electrical System1
Communication1
Engine1
Power Train1
Vehicle Speed Control1

What owners describe

“I do Own a Mercedes-Benz 2020 SL-550. On August 27, 2025, I was stopped at the curb adjacent to my house at [XXX] . When I gently tried to go right into driveway of my house, the tire hit the curb. When I gently again tried to release the tire from the curb, the car all of the sudden jump into the air with high speed, …”Feb 6, 2026 · Engine · NHTSA owner report

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Crash ratings

Source: NHTSA NCAP

NHTSA has not published 5-Star crash ratings for this model year.

Other SL-Class model years

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). Floor 35. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Complaint counts and NHTSA crash ratings are shown separately and are not blended into the grade.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed weekly.

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