Most common 2020 Mercedes-Benz SL450 problems
Share of the 1 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz SL450 complaints by model year
2020 Mercedes-Benz SL450 recalls (2)
Communication › Auto crash notification
Mercedes-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.
Remedy: The 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.
Communication › Auto crash notification
Mercedes-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.
Remedy: MBUSA 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.
2020 Mercedes-Benz SL450 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo | 9-speed automatic | RWD | 20 / 28 / 22 |
EPA ratings. Class: Sports car.
Frequently asked questions
Is the 2020 Mercedes-Benz SL450 a good car?
Based on 1 owner complaint filed with NHTSA, the 2020 SL450 rates few complaints: 1.2× as many complaints as a typical year of the SL450 at the same age. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2020 Mercedes-Benz SL450?
The electrical system — 1 complaint, 100% of all complaints for this model year. Next is the equipment & accessories (1).
How many recalls does the 2020 Mercedes-Benz SL450 have?
There are 2 recalls for the 2020 Mercedes-Benz SL450, the most recent from May 20, 2022 (auto crash notification). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.