“It took way too long from the time we ordered it to the delivery date. It took six months. that's terrible.”
2015 Mercedes-Benz SL: What's New, Specs & Features
Last updated August 4, 2026
The biggest change for the 2015 Mercedes-Benz SL is the arrival of the SL 400, a new entry model powered by a twin-turbo V6. The SL 63 AMG also makes its former AMG Performance Package content standard, while the rest of the range changes very little.
About the 2015 Mercedes-Benz SL
R231 sixth generation, fourth model year before the 2017 facelift.
Mercedes-Benz positions the SL as an open-top luxury roadster that can feel like both a relaxed grand-touring coupe and a sporty two-seat convertible. Its core appeal is the combination of strong power, a retractable hardtop, high-end cabin materials, and everyday comfort that is unusual in a low-slung sports car. Compared with purer track-focused rivals, the SL leans more toward effortless speed, quiet cruising, and year-round usability.
The 2015 SL lineup stretches from the more approachable V6-powered SL 400 to the V12 SL 65 AMG, with every version retaining the two-seat retractable-hardtop layout. The SL 400 emphasizes comfort with heated memory seats, navigation, and Harman/Kardon audio, while the SL 63 AMG adds sharper performance hardware and the SL 65 AMG pairs V12 power with features such as adaptive cruise control and a variable-tint glass roof.
What changed, by category
Powertrain
The new SL 400 joins the lineup with a twin-turbo 3.0-liter V6 and a seven-speed automatic transmission. The SL 63 AMG makes the former AMG Performance Package’s higher-output engine tune and limited-slip rear differential standard.
2015 Mercedes-Benz SL specs and features by trim
| Feature | ||||
|---|---|---|---|---|
| Engine | V6, Twin Turbo, 3.0 Liter | V8, Twin Turbo, 4.7 Liter | V8, Twin Turbo, 5.5 Liter | V12, Twin Turbo, 6.0 Liter |
| Transmission | Auto, 7-Spd 7G-Tronic+ | Auto, 7-Spd 7G-Tronic+ | Auto, 7Spd SPEEDSHIFT MCT | Auto, 7Spd SPEEDSHIFT+ |
| Drivetrain | RWD | RWD | RWD | RWD |
| Fuel Type | Gas | Gas | Gas | Gas |
| MPG City | 20 mpg | 17 mpg | 16 mpg | 14 mpg |
| MPG Highway | 27 mpg | 24 mpg | 25 mpg | 21 mpg |
| Horsepower | 329 hp | 429 hp | 530 hp | 621 hp |
| Torque | 354 lb-ft | 516 lb-ft | 590 lb-ft | 738 lb-ft |
| Trunk/Cargo | 13.5 cu-ft | 13.5 cu-ft | 13.5 cu-ft | 13.5 cu-ft |
| Seats | 2 | 2 | 2 | 2 |
| Doors | 2 | 2 | 2 | 2 |
| Adaptive Cruise Control | ||||
| Alarm System | ||||
| Automatic Emergency Braking | ||||
| Automatic High Beams | ||||
| Blindspot Sensors with Auto Brake | ||||
| Active Lane Keep Assistance | ||||
| Night Vision System | ||||
| Park Assist | ||||
| Rear View Camera | ||||
| Alloy Wheels | ||||
| Fog Lights | ||||
| Panorama Moon Roof | ||||
| Power Close Liftgate/Trunk | ||||
| Rear Spoiler | ||||
| Navigation System | ||||
| Premium Audio | ||||
| Smartphone Interface | ||||
| Subwoofer | ||||
| Heated Front Seats | ||||
| Leather Interior Trim | ||||
| Leather Seats | ||||
| Massage Front Seat | ||||
| Proximity Keyless Entry | ||||
| Remote Start | ||||
| Ventilated Front Seats | ||||
| Wood Interior Trim | ||||
Frequently asked questions
What is new on the 2015 Mercedes-Benz SL?
The main addition is the SL 400, a new entry model with a twin-turbo 3.0-liter V6. The SL 63 AMG also receives its former AMG Performance Package content as standard, and the rest of the lineup largely carries over.
Was the Mercedes-Benz SL 400 new for 2015?
Yes. The SL 400 joined the U.S. lineup for 2015 with a twin-turbo 3.0-liter V6, a seven-speed automatic transmission, and the same retractable-hardtop layout as the other SL models.
What changed on the 2015 SL 63 AMG?
The 2015 SL 63 AMG makes the former AMG Performance Package content standard. That brings the higher-output engine tune and limited-slip rear differential into the regular SL 63 AMG equipment list.
Is the 2015 Mercedes-Benz SL a redesigned model?
No. The 2015 SL is the fourth model year of the R231 generation, not a full redesign or facelift. Its changes center on the new SL 400 and added standard performance equipment for the SL 63 AMG.
Is the 2015 SL meaningfully different from the 2014 model?
It is meaningfully different mainly for shoppers considering the new V6-powered SL 400 or the SL 63 AMG with its newly standard performance hardware. The SL 550, SL 65 AMG, body design, and overall hardtop-roadster formula otherwise change very little.
2015 Mercedes-Benz SL Reviews
What owners are saying about the 2015 Mercedes-Benz SL.
4.5
2015 Mercedes-Benz SL
(75 reviews)
“Vey happy with purchase as I traded in a custom-ordered 2015 Mercedes-Benz C400 with every possible option and only 920.9 miles on the odometer for a 2015 SL400.”
“Would like back u camcera to work with the radio OFF, does in my Ford Pick up truck”