Mercedes-Benz SL
2017–2020 model years · Generation introduced 2012
Compare the years. Keep the details.
Compare model years ↓
- Available years
- 2017–2020
- Yearly records
- 4
- Reported market values
- $31,350–$44,575
The overview
This generation brought a significantly revised car, one that is wider, longer and fitted with a host of high-tech safety features. While we appreciate the outstanding fit, finish and creature comforts, the look of this version of the SL leaves us somewhat cold. The previous design looks much better. With that said, exceptionally powerful turbocharged V8 and V12 engines are offered, along with an adjustable-opacity feature for the folding hardtop. Practically every known electronic driver's assistance safety feature is also available. Ride quality and handling are unsurpassed, with the SL performing like a much smaller and lighter sports car when called upon to do so, while providing outstanding smoothness and ride comfort when it is required.
Generation summary from Consumer Reports. Year-specific figures appear below; missing values mean unavailable, not zero.
Compare the years
Each row keeps its own source data.
| Model year | Market value | Reliability | Owner rating | EPA combined |
|---|---|---|---|---|
| 2020 ↗ SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed | $44,575 | Not rated | Not rated | 20 MPG |
| 2019 ↗ SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed | $41,500 | Not rated | Not rated | 20 MPG |
| 2018 ↗ SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed | $35,100 | Not rated | Not rated | 20 MPG |
| 2017 ↗ SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed | $31,350 | Not rated | Not rated | 20 MPG |
Values depend on trim and condition. Ratings are source-reported; road-test results may describe a tested configuration.
Year by year
2020 model
SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed · Conventional · Used
Find 2020 listings ↗ Specifications
Overview
- Powertrain
- Conventional
- Body style
- convertible
- Drive type
- RWD
- Transmission
- Automatic
- Category
- Sports cars 4/5-seat
- Generation began
- 2012
Pricing
- Current retail median
- $44,575
- Retail value range
- $39,450 - $49,700
- Original MSRP range
- $91,000 - $114,700
- Trade-in range
- $35,675 - $45,000
Fuel economy
- EPA city
- 17 MPG
- EPA highway
- 25 MPG
- EPA combined
- 20 MPG
Road tests
- Test status
- Not Tested
Dimensions
- Length
- 182 in
- Width
- 74 in
- Height
- 51 in
- Wheelbase
- 102 in
- Weight
- 3,960 lb
- Towing capacity
- 0 lb
Interior
- Seating
- 2 people
Environmental impact
- Air pollution score
- 3/10
- Greenhouse gas score
- 4/10
- SmartWay
- No
Vehicle ID: 14464 First published: July 22, 2020 Updated: September 11, 2026
Values may vary by trim, options, location, and market conditions.
2019 model
SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed · Conventional · Used
Find 2019 listings ↗
Specifications
Overview
- Powertrain
- Conventional
- Body style
- convertible
- Drive type
- RWD
- Transmission
- Automatic
- Category
- Sports cars 4/5-seat
- Generation began
- 2012
Pricing
- Current retail median
- $41,500
- Retail value range
- $32,900 - $63,650
- Original MSRP range
- $89,150 - $154,450
- Trade-in range
- $29,255 - $57,500
Fuel economy
- EPA city
- 17 MPG
- EPA highway
- 25 MPG
- EPA combined
- 20 MPG
Road tests
- Test status
- Not Tested
Dimensions
- Length
- 182 in
- Width
- 74 in
- Height
- 51 in
- Wheelbase
- 102 in
- Weight
- 3,960 lb
- Towing capacity
- 0 lb
Interior
- Seating
- 2 people
Environmental impact
- Air pollution score
- 3/10
- Greenhouse gas score
- 4/10
- SmartWay
- No
Vehicle ID: 13312 First published: July 22, 2020 Updated: September 11, 2026
Values may vary by trim, options, location, and market conditions.
2018 model
SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed · Conventional · Used
Find 2018 listings ↗
Specifications
Overview
- Powertrain
- Conventional
- Body style
- convertible
- Drive type
- RWD
- Transmission
- Automatic
- Category
- Sports cars 4/5-seat
- Generation began
- 2012
Pricing
- Current retail median
- $35,100
- Retail value range
- $28,850 - $56,700
- Original MSRP range
- $88,200 - $222,000
- Trade-in range
- $25,250 - $51,100
Fuel economy
- EPA city
- 17 MPG
- EPA highway
- 25 MPG
- EPA combined
- 20 MPG
Road tests
- Test status
- Not Tested
Dimensions
- Length
- 182 in
- Width
- 74 in
- Height
- 51 in
- Wheelbase
- 102 in
- Weight
- 3,960 lb
- Towing capacity
- 0 lb
Interior
- Seating
- 2 people
Environmental impact
- Air pollution score
- 1/10
- Greenhouse gas score
- 4/10
- SmartWay
- No
Vehicle ID: 11964 First published: July 22, 2020 Updated: September 11, 2026
Values may vary by trim, options, location, and market conditions.
2017 model
SL550 convertible Rear 4.7-liter V8 (449 hp) turbo (Premium Gasoline) Automatic 9-speed · Conventional · Used
Find 2017 listings ↗
Specifications
Overview
- Powertrain
- Conventional
- Body style
- convertible
- Drive type
- RWD
- Transmission
- Automatic
- Category
- Sports cars 4/5-seat
- Generation began
- 2012
Pricing
- Current retail median
- $31,350
- Retail value range
- $25,925 - $51,475
- Original MSRP range
- $86,950 - $219,850
- Trade-in range
- $22,355 - $46,300
Fuel economy
- EPA city
- 17 MPG
- EPA highway
- 25 MPG
- EPA combined
- 20 MPG
Road tests
- Test status
- Not Tested
Dimensions
- Length
- 182 in
- Width
- 74 in
- Height
- 51 in
- Wheelbase
- 102 in
- Weight
- 3,960 lb
- Towing capacity
- 0 lb
Interior
- Seating
- 2 people
Environmental impact
- Air pollution score
- 5/10
- Greenhouse gas score
- 4/10
- SmartWay
- No
Vehicle ID: 7611 First published: July 22, 2020 Updated: September 11, 2026
Values may vary by trim, options, location, and market conditions.
Behind the data
Latest source update: September 11, 2026
Vehicle summaries, specifications, pricing and ratings come from Consumer Reports vehicle records. Auto Guide groups these records by model and reported generation start year.
Available years are listed explicitly. Gaps do not imply that a model was discontinued. Prices are source estimates, not live offers. No first-hand road test by Auto Guide is claimed.
