Mercedes-Benz SLK (R171) 2004-2011 230K 197bhp remap figures
Stock, this 2004-2011 Mercedes-Benz SLK petrol (2.3L) produces 197bhp and 285Nm. Our expected figures for a Stage 1 remap are 225bhp and 313Nm, an expected gain of up to 28bhp and 28Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 197 bhp | 225 bhp | +28 bhp |
| Torque | 285 Nm | 313 Nm | +28 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 197 bhp | 285 Nm | |
| Stage 1Maximum software-only performance | 225 bhp | 313 Nm | +28 bhp +28 Nm |
| Stage 1 EcoPerformance with economy in mind | 218 bhp | 311 Nm | +21 bhp +26 Nm |
| Eco mapEconomy first | 216 bhp | 309 Nm | +19 bhp +24 Nm |
Who is the Stage 1 map for?
- Drivers who want a sharper throttle and a small, honest gain from software alone.
- Owners who would rather keep the car standard in every other way.
- Anyone who wants the fullest software-only map for this engine, accepting that the gain is modest without a turbocharger.
What this means for your SLK
Without a turbocharger the improvement comes from ignition, fuelling and throttle mapping rather than boost, so expect a smaller but still noticeable change in response.
Engine management is by a Siemens SIM4LKE unit. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Mercedes-Benz SLK 230K 197bhp?
We expect 225bhp and 313Nm against 197bhp and 285Nm as standard: up to +28bhp and +28Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Mercedes-Benz SLK 230K 197bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 218bhp and 311Nm expected. The Eco map is economy first: 216bhp and 309Nm. Both still sit above the standard 197bhp and 285Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Mercedes-Benz SLK figures
Other petrol variants
- 200K 181bhp 2004-2011
- 280 227bhp 2004-2011
- 200K 163bhp 2004-2011
- 350 268bhp 2004-2011
- 55 AMG 354bhp 2004-2011
All petrol SLK (R171) variants · SLK (R171) 2004-2011 overview · All Mercedes-Benz figures