“Most fun of any two-seat roadster I've ever owned. As one lady stated about the car, "drop dead gorgeous." Power to weight ratio is amazing.”
2015 Mercedes-Benz SLK: What's New, Specs & Features
Last updated August 4, 2026
The 2015 Mercedes-Benz SLK is largely a carryover, with no redesign or engine changes. The main update is that the SLK 55 AMG’s Lighting Package becomes standard, adding adaptive bi-xenon headlights and automatic high beams.
About the 2015 Mercedes-Benz SLK
3rd generation R172, fourth U.S. model year, and the last year before the 2016 base-model powertrain update that replaced SLK 250 with SLK 300.
Mercedes-Benz positions the SLK as a compact luxury roadster that mixes sports-car roots with everyday comfort. Its key difference from soft-top rivals is the folding hardtop: with the roof up, it aims to feel more like a small coupe; with the roof down, it delivers classic two-seat roadster fun. Compared with rivals such as the BMW Z4 and Porsche Boxster, the SLK leans more toward style, all-season usability, and comfort features without giving up strong engine choices.
The SLK 250 is the entry point, pairing a 201-hp turbo four-cylinder engine with a power-folding panoramic hardtop. The SLK 350 adds a 302-hp V6, heated seats and neck-level heating, while the SLK 55 AMG stands apart with a hand-built 415-hp V8 and AMG-tuned suspension.
What changed, by category
Safety
The SLK 55 AMG’s Lighting Package becomes standard, bringing adaptive bi-xenon headlights and automatic high beams to that trim as standard equipment.
Styling
A painted hardtop panel is offered as a no-cost alternative to the panoramic glass panel. On the SLK 55 AMG, the rear spoiler changes from standard to optional.
2015 Mercedes-Benz SLK specs and features by trim
| Feature | |||
|---|---|---|---|
| Engine | 4-Cyl, Turbo, 1.8 Liter | V6, 3.5 Liter | V8, 5.5 Liter |
| Transmission | Auto, 7-Spd 7G-Tronic + | Auto, 7-Spd 7G-Tronic + | Auto 7-Spd AMG SPEEDSHIFT |
| Drivetrain | RWD | RWD | RWD |
| Fuel Type | Gas | Gas | Gas |
| MPG City | 23 mpg | 20 mpg | 19 mpg |
| MPG Highway | 33 mpg | 29 mpg | 28 mpg |
| Horsepower | 201 hp | 302 hp | 415 hp |
| Torque | 229 lb-ft | 273 lb-ft | 398 lb-ft |
| Trunk/Cargo | 10.1 cu-ft | 10.1 cu-ft | 10.1 cu-ft |
| Seats | 2 | 2 | 2 |
| Doors | 2 | 2 | 2 |
| Adaptive Cruise Control | |||
| Adaptive Headlights | |||
| Alarm System | |||
| Automatic Emergency Braking | |||
| Automatic High Beams | |||
| Blindspot Sensors | |||
| Lane Departure Warning | |||
| Park Assist | |||
| Alloy Wheels | |||
| HID Headlights | |||
| Panorama Moon Roof | |||
| Rear Spoiler | |||
| Navigation System | |||
| Premium Audio | |||
| Smartphone Interface | |||
| Dual-Zone Climate Control | |||
| Heated Front Seats | |||
| Interior Ambient Lighting | |||
| Leather Seats | |||
| Proximity Keyless Entry | |||
| Remote Start | |||
Frequently asked questions
What is the biggest change to the 2015 Mercedes-Benz SLK?
The biggest change is on the SLK 55 AMG, where the Lighting Package becomes standard. It adds adaptive bi-xenon headlights and automatic high beams as standard equipment.
Was the 2015 Mercedes-Benz SLK redesigned?
No, the 2015 SLK was not redesigned. It continues with the same third-generation retractable-hardtop design and receives only minor equipment changes.
Did the 2015 Mercedes-Benz SLK get new engines?
No, the engine lineup carries over unchanged. The SLK 250 has a 1.8-liter turbo four-cylinder, the SLK 350 has a 3.5-liter V6, and the SLK 55 AMG has a 5.5-liter V8.
What changed on the 2015 SLK 55 AMG?
The 2015 SLK 55 AMG gains the Lighting Package as standard equipment, including adaptive bi-xenon headlights and automatic high beams. Its rear spoiler changes from standard to optional.
Did the 2015 Mercedes-Benz SLK hardtop change?
The folding-hardtop design did not change, but a painted roof panel is offered as a no-cost alternative to the panoramic glass panel.
2015 Mercedes-Benz SLK Reviews
What owners are saying about the 2015 Mercedes-Benz SLK.
4.5
2015 Mercedes-Benz SLK
(80 reviews)
“The carpeting and car mats are inexpensive and not plush- not anticipated with purchasing SLK 55.”
“Love it. Enjoy driving it. Navigational system inferior to previous COMAND system in the GLK.”