2009 Mercedes-Benz SLK: What's New, Specs & Features
Last updated August 4, 2026
The 2009 Mercedes-Benz SLK gets a mid-cycle refresh led by revised front and rear styling and a quicker Direct Steer system. It is a meaningful update, not a full redesign.
About the 2009 Mercedes-Benz SLK
2nd generation (R171, 2005-2011), late-cycle facelift year
The 2009 SLK is Mercedes-Benz’s compact two-seat luxury roadster for shoppers who want coupe-like security and quiet when the roof is up, plus open-air driving at the push of a button. Compared with more stripped-down sports cars, the SLK leans toward comfort, build quality, and everyday ease, but reviewers still described it as a genuine driver’s car. Its biggest differentiator is the folding hardtop, which gives it a dual personality as both weekend convertible and small premium coupe.
The 2009 SLK remains a two-seat luxury roadster with a one-button retractable hardtop. The SLK 300 pairs a 3.0-liter V6 with a six-speed manual, while the stronger SLK 350 has a 300-hp V6 and seven-speed automatic. The SLK 55 AMG sits at the top with a 5.5-liter V8, AMG brakes, firmer suspension, and more aggressive bodywork.
What changed, by category
2009 Mercedes-Benz SLK specs and features by trim
| Feature | |||
|---|---|---|---|
| Engine | V6, 3.0 Liter | V6, 3.5 Liter | V8, 5.5 Liter |
| Transmission | Auto, 7-Spd Touch Shift | Auto, 7-Spd Touch Shift | Auto, 7-Spd SPEEDSHIFT |
| Drivetrain | RWD | RWD | RWD |
| Fuel Type | Gas | Gas | Gas |
| MPG City | 17 mpg | 18 mpg | 14 mpg |
| MPG Highway | 26 mpg | 26 mpg | 22 mpg |
| Horsepower | 228 hp | 300 hp | 355 hp |
| Torque | 221 lb-ft | 265 lb-ft | 376 lb-ft |
| Trunk/Cargo | 9.8 cu-ft | 9.8 cu-ft | 9.8 cu-ft |
| Seats | 2 | 2 | 2 |
| Doors | 2 | 2 | 2 |
| Alarm System | |||
| Rain Sensing Windshield Wipers | |||
| Alloy Wheels | |||
| Fog Lights | |||
| Rear Spoiler | |||
| Bluetooth | |||
| Navigation System | |||
| Premium Audio | |||
| Satellite Radio | |||
| Auto-Dimming Interior Mirror | |||
| Dual Power Front Seats | |||
| Dual-Zone Climate Control | |||
| Heated Front Seats | |||
| Integrated Garage Door Opener | |||
| Interior Ambient Lighting | |||
| Leather Seats | |||
| Memory Driver's Seat | |||
| Memory Front Seats | |||
| Memory Steering Wheel | |||
| Proximity Keyless Entry | |||
| Tilt/Telescoping Steering Wheel | |||
| Wood Interior Trim | |||
Frequently asked questions
Is the 2009 Mercedes-Benz SLK a full redesign?
No. The 2009 SLK is a late-cycle refresh of the second-generation R171 model, with updated styling, steering, cabin controls, and selected mechanical changes rather than an all-new platform.
What is the biggest change to the 2009 Mercedes-Benz SLK?
The main change is a mid-cycle refresh combining revised front and rear styling with the new Direct Steer variable-ratio steering system. Direct Steer was added across the range for quicker steering response.
Did the 2009 Mercedes-Benz SLK 350 get more power?
Yes. The 2009 SLK 350 has a revised 3.5-liter V6 rated at 300 horsepower, paired with a seven-speed automatic transmission.
Did the SLK 280 become the SLK 300 for 2009?
Yes. Mercedes renamed the U.S. base model from SLK 280 to SLK 300 for 2009. The SLK 300 uses a 3.0-liter V6 and comes with a six-speed manual transmission.
Which 2009 Mercedes-Benz SLK has a V8?
The 2009 SLK 55 AMG has the V8. Its 5.5-liter AMG engine is joined by a seven-speed automatic, AMG brakes, firmer suspension, and distinct body styling.