DecodedCars2020 Mercedes-Benz SL-Class
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2020 models.
- Class
- Two Seaters
- Body styles
- Sl450 2dr Convertible, Sl550 2dr Convertible
- Engines
- 3.0L 6-cyl turbo, 4.7L 8-cyl turbo
- Drivetrain
- Rear-Wheel Drive
- Fuel
- Premium Gasoline
- MPG (best)
- 22 combined · 20 city / 28 hwy
- Length
- 182.3 in
- Curb weight
- 3,825–3,957 lb
- NHTSA rating
- Not rated
- Recalls
- 0 campaigns
Pros & cons
What's good
- No recalls so far
Watch out for
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data against 6 similar 2020 models — not a review. How we calculate this →
Overview
The 2020 Mercedes-Benz SL-Class is a two seaters offered with 2 engines (3.0L 6-cyl turbo and 4.7L 8-cyl turbo) and rear-wheel drive.
It measures about 182 inches long and 74 inches wide on a 102-inch wheelbase, with a curb weight of roughly 3,825 lb (Sl450 2dr Convertible).
EPA rates its most efficient version at 22 MPG combined (20 city / 28 highway), 12% better than the 2020 two seaters average of 19.6 MPG, for an estimated $3,750 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
There are no recalls or owner complaints on file with NHTSA for this model year.
What changed for 2020
- Engine dropped: 5.5L 8-cyl turbo
Compared with 2019; trim, feature and price changes aren't covered. See the 2019 SL-Class →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| Sl450 2dr Convertible | 182.3 in | 74 in | 52 in | 102 in | 63 / 63 in | 3,825 lb | 50/50 |
| Sl550 2dr Convertible | 182.3 in | 74 in | 52 in | 102 in | 63 / 63 in | 3,957 lb | 52/48 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| SL450 | 3.0L 6-cyl turbo | Automatic 9-spd | Rear-Wheel Drive | 20 / 28 / 22 | +12% | $3,750 | 395 |
| SL550 | 4.7L 8-cyl turbo | Automatic 9-spd | Rear-Wheel Drive | 17 / 25 / 20 | +2% | $4,100 | 435 |
EPA estimates; "vs. class" is combined MPG against the 2020 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2020 Mercedes-Benz SL-Class.
Similar 2020 two seaterss
| Model | Best MPG / range | NHTSA overall | Recalls |
|---|---|---|---|
| 2020 Mercedes-Benz SL-Class (this car) | 22 MPG | Not rated | 0 |
| 2020 Porsche 911 | 20 MPG | Not rated | 8 |
| 2020 Mercedes-Benz AMG GT | 21 MPG | Not rated | 12 |
| 2020 Acura NSX | 21 MPG | Not rated | 1 |
| 2020 Audi R8 | 16 MPG | Not rated | 0 |
| 2020 Jaguar F-Type | 26 MPG | Not rated | 2 |
| 2020 Porsche 718 | 19 MPG | Not rated | 0 |
Recalls (0)
No vehicle recalls on file with NHTSA for the 2020 Mercedes-Benz SL-Class.
Check your VIN for open recalls at NHTSA ↗Not every 2020 Mercedes-Benz SL-Class is affected — only a VIN check confirms your car.
Owner-reported problems
No owner complaints for the 2020 Mercedes-Benz SL-Class in NHTSA's database since 2015.
Used 2020 Mercedes-Benz SL-Class buyer's checklist
- Run the VIN at nhtsa.gov/recalls. No recalls on file, but check anyway.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2020 Mercedes-Benz SL-Class. Not a substitute for a professional inspection.
Other SL-Class years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2027 SL-Class | 23 | – | Not rated | 0 | 0 |
| 2026 SL-Class | 22 | – | Not rated | 0 | 0 |
| 2025 SL-Class | 22 | – | Not rated | 0 | 0 |
| 2024 SL-Class | 22 | – | Not rated | 0 | 0 |
| 2023 SL-Class | 23 | – | Not rated | 0 | 0 |
| 2022 SL-Class | 16 | – | Not rated | 0 | 0 |
| 2019 SL-Class | 23 | 182.3 in | Not rated | 0 | 0 |
| 2018 SL-Class | 23 | 182.3 in | Not rated | 0 | 0 |
| 2017 SL-Class | 23 | 182.3 in | Not rated | 0 | 0 |
| 2016 SL-Class | 23 | 181.9 in | Not rated | 0 | 0 |
| 2015 SL-Class | 23 | 181.9 in | Not rated | 0 | 0 |
| 2014 SL-Class | 20 | 181.9 in | Not rated | 0 | 0 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Mercedes-Benz. How we calculate this →